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/memsafety/test-0513_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:16:13,848 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:16:13,850 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:16:13,865 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:16:13,865 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:16:13,866 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:16:13,867 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:16:13,869 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:16:13,871 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:16:13,872 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:16:13,873 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:16:13,873 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:16:13,874 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:16:13,875 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:16:13,876 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:16:13,879 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:16:13,881 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:16:13,883 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:16:13,884 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:16:13,885 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:16:13,888 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:16:13,888 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:16:13,888 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:16:13,889 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:16:13,890 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:16:13,891 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:16:13,892 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:16:13,892 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:16:13,892 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:16:13,893 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:16:13,893 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:16:13,894 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 20:16:13,902 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:16:13,902 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:16:13,903 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:16:13,903 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:16:13,903 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:16:13,903 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:16:13,903 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:16:13,904 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:16:13,904 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:16:13,904 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:16:13,904 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:16:13,904 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:16:13,905 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:16:13,905 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:16:13,905 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:16:13,905 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:16:13,905 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:16:13,905 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:16:13,905 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:16:13,906 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:16:13,906 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:16:13,906 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:16:13,906 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:16:13,906 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:16:13,906 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:16:13,907 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:16:13,907 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:16:13,907 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:16:13,907 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:16:13,907 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:16:13,907 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:16:13,907 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:16:13,908 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:16:13,908 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:16:13,908 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:16:13,908 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:16:13,909 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:16:13,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:16:13,952 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:16:13,956 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:16:13,957 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:16:13,957 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:16:13,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0513_true-valid-memsafety.i [2018-01-24 20:16:14,107 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:16:14,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:16:14,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:16:14,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:16:14,118 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:16:14,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:16:14" (1/1) ... [2018-01-24 20:16:14,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8bf943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14, skipping insertion in model container [2018-01-24 20:16:14,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:16:14" (1/1) ... [2018-01-24 20:16:14,133 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:16:14,172 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:16:14,284 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:16:14,306 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:16:14,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14 WrapperNode [2018-01-24 20:16:14,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:16:14,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:16:14,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:16:14,318 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:16:14,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14" (1/1) ... [2018-01-24 20:16:14,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14" (1/1) ... [2018-01-24 20:16:14,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14" (1/1) ... [2018-01-24 20:16:14,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14" (1/1) ... [2018-01-24 20:16:14,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14" (1/1) ... [2018-01-24 20:16:14,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14" (1/1) ... [2018-01-24 20:16:14,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14" (1/1) ... [2018-01-24 20:16:14,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:16:14,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:16:14,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:16:14,360 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:16:14,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14" (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 20:16:14,412 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:16:14,412 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:16:14,412 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:16:14,412 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:16:14,412 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:16:14,412 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:16:14,413 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:16:14,413 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:16:14,413 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:16:14,413 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:16:14,413 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:16:14,413 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:16:14,414 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-24 20:16:14,414 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:16:14,414 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:16:14,414 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:16:14,414 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:16:14,889 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:16:14,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:16:14 BoogieIcfgContainer [2018-01-24 20:16:14,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:16:14,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:16:14,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:16:14,894 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:16:14,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:16:14" (1/3) ... [2018-01-24 20:16:14,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c120b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:16:14, skipping insertion in model container [2018-01-24 20:16:14,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:16:14" (2/3) ... [2018-01-24 20:16:14,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c120b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:16:14, skipping insertion in model container [2018-01-24 20:16:14,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:16:14" (3/3) ... [2018-01-24 20:16:14,898 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0513_true-valid-memsafety.i [2018-01-24 20:16:14,904 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:16:14,912 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 59 error locations. [2018-01-24 20:16:14,953 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:16:14,953 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:16:14,953 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:16:14,953 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:16:14,953 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:16:14,953 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:16:14,954 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:16:14,954 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:16:14,954 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:16:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2018-01-24 20:16:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-24 20:16:14,981 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:14,982 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:14,982 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:14,986 INFO L82 PathProgramCache]: Analyzing trace with hash -894299951, now seen corresponding path program 1 times [2018-01-24 20:16:14,988 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:15,029 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,029 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:15,029 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,029 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:15,070 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:15,096 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 20:16:15,098 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:15,098 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:16:15,098 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:15,101 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 20:16:15,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 20:16:15,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 20:16:15,115 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 2 states. [2018-01-24 20:16:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:15,235 INFO L93 Difference]: Finished difference Result 268 states and 294 transitions. [2018-01-24 20:16:15,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 20:16:15,236 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-01-24 20:16:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:15,246 INFO L225 Difference]: With dead ends: 268 [2018-01-24 20:16:15,246 INFO L226 Difference]: Without dead ends: 134 [2018-01-24 20:16:15,252 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 20:16:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-01-24 20:16:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-01-24 20:16:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-01-24 20:16:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2018-01-24 20:16:15,293 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 9 [2018-01-24 20:16:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:15,293 INFO L432 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2018-01-24 20:16:15,293 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 20:16:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2018-01-24 20:16:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 20:16:15,294 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:15,294 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:15,294 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:15,294 INFO L82 PathProgramCache]: Analyzing trace with hash -477652767, now seen corresponding path program 1 times [2018-01-24 20:16:15,294 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:15,295 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,295 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:15,296 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,296 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:15,308 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:15,349 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 20:16:15,350 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:15,350 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:16:15,350 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:15,352 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:16:15,352 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:16:15,352 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:16:15,353 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand 3 states. [2018-01-24 20:16:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:15,528 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2018-01-24 20:16:15,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:16:15,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-24 20:16:15,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:15,530 INFO L225 Difference]: With dead ends: 178 [2018-01-24 20:16:15,530 INFO L226 Difference]: Without dead ends: 176 [2018-01-24 20:16:15,531 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:16:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-01-24 20:16:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2018-01-24 20:16:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-01-24 20:16:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2018-01-24 20:16:15,540 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 11 [2018-01-24 20:16:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:15,541 INFO L432 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2018-01-24 20:16:15,541 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:16:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2018-01-24 20:16:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 20:16:15,541 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:15,541 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:15,541 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:15,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1922337046, now seen corresponding path program 1 times [2018-01-24 20:16:15,542 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:15,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,543 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:15,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,543 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:15,554 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:15,582 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 20:16:15,583 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:15,583 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:16:15,583 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:15,583 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:16:15,584 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:16:15,584 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:16:15,584 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand 3 states. [2018-01-24 20:16:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:15,652 INFO L93 Difference]: Finished difference Result 282 states and 299 transitions. [2018-01-24 20:16:15,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:16:15,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-01-24 20:16:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:15,655 INFO L225 Difference]: With dead ends: 282 [2018-01-24 20:16:15,655 INFO L226 Difference]: Without dead ends: 153 [2018-01-24 20:16:15,656 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:16:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-01-24 20:16:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2018-01-24 20:16:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-01-24 20:16:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2018-01-24 20:16:15,664 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 12 [2018-01-24 20:16:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:15,664 INFO L432 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2018-01-24 20:16:15,664 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:16:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2018-01-24 20:16:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 20:16:15,664 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:15,664 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:15,665 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash 537460283, now seen corresponding path program 1 times [2018-01-24 20:16:15,665 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:15,666 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,666 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:15,666 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,666 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:15,675 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:15,711 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 20:16:15,711 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:15,711 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:16:15,712 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:15,712 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:16:15,712 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:16:15,712 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:16:15,713 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand 4 states. [2018-01-24 20:16:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:15,973 INFO L93 Difference]: Finished difference Result 223 states and 239 transitions. [2018-01-24 20:16:15,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:16:15,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 20:16:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:15,977 INFO L225 Difference]: With dead ends: 223 [2018-01-24 20:16:15,977 INFO L226 Difference]: Without dead ends: 219 [2018-01-24 20:16:15,977 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 20:16:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-01-24 20:16:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 149. [2018-01-24 20:16:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-01-24 20:16:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2018-01-24 20:16:15,992 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 13 [2018-01-24 20:16:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:15,992 INFO L432 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2018-01-24 20:16:15,992 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:16:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2018-01-24 20:16:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 20:16:15,993 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:15,993 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:15,993 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:15,993 INFO L82 PathProgramCache]: Analyzing trace with hash 537460284, now seen corresponding path program 1 times [2018-01-24 20:16:15,993 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:15,994 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,995 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:15,995 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:15,995 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:16,008 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:16,073 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 20:16:16,073 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:16,073 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:16:16,074 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:16,074 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:16:16,074 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:16:16,074 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:16:16,074 INFO L87 Difference]: Start difference. First operand 149 states and 163 transitions. Second operand 4 states. [2018-01-24 20:16:16,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:16,194 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2018-01-24 20:16:16,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:16:16,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 20:16:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:16,195 INFO L225 Difference]: With dead ends: 149 [2018-01-24 20:16:16,195 INFO L226 Difference]: Without dead ends: 147 [2018-01-24 20:16:16,196 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 20:16:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-01-24 20:16:16,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-01-24 20:16:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-01-24 20:16:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2018-01-24 20:16:16,205 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 13 [2018-01-24 20:16:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:16,205 INFO L432 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2018-01-24 20:16:16,205 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:16:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2018-01-24 20:16:16,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 20:16:16,206 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:16,206 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:16,206 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:16,207 INFO L82 PathProgramCache]: Analyzing trace with hash 632206755, now seen corresponding path program 1 times [2018-01-24 20:16:16,207 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:16,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:16,208 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:16,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:16,208 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:16,224 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:16,254 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 20:16:16,255 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:16,255 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:16:16,255 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:16,255 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:16:16,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:16:16,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:16:16,256 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand 4 states. [2018-01-24 20:16:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:16,386 INFO L93 Difference]: Finished difference Result 185 states and 198 transitions. [2018-01-24 20:16:16,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:16:16,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-24 20:16:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:16,388 INFO L225 Difference]: With dead ends: 185 [2018-01-24 20:16:16,388 INFO L226 Difference]: Without dead ends: 181 [2018-01-24 20:16:16,388 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 20:16:16,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-01-24 20:16:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 143. [2018-01-24 20:16:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-01-24 20:16:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2018-01-24 20:16:16,396 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 20 [2018-01-24 20:16:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:16,396 INFO L432 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2018-01-24 20:16:16,397 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:16:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2018-01-24 20:16:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 20:16:16,397 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:16,398 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:16,398 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:16,398 INFO L82 PathProgramCache]: Analyzing trace with hash 632206756, now seen corresponding path program 1 times [2018-01-24 20:16:16,398 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:16,399 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:16,399 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:16,399 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:16,400 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:16,416 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:16,459 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 20:16:16,459 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:16,459 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:16:16,459 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:16,460 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:16:16,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:16:16,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:16:16,460 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand 4 states. [2018-01-24 20:16:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:16,609 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2018-01-24 20:16:16,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:16:16,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-24 20:16:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:16,610 INFO L225 Difference]: With dead ends: 143 [2018-01-24 20:16:16,611 INFO L226 Difference]: Without dead ends: 140 [2018-01-24 20:16:16,611 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 20:16:16,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-01-24 20:16:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-01-24 20:16:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-01-24 20:16:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2018-01-24 20:16:16,616 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 20 [2018-01-24 20:16:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:16,616 INFO L432 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2018-01-24 20:16:16,616 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:16:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2018-01-24 20:16:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 20:16:16,617 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:16,617 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:16,618 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash -145487102, now seen corresponding path program 1 times [2018-01-24 20:16:16,619 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:16,619 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:16,619 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:16,619 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:16,619 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:16,637 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:16:16,682 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:16,682 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:16:16,682 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:16,682 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:16:16,682 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:16:16,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:16:16,683 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand 5 states. [2018-01-24 20:16:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:16,854 INFO L93 Difference]: Finished difference Result 355 states and 389 transitions. [2018-01-24 20:16:16,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:16:16,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-24 20:16:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:16,856 INFO L225 Difference]: With dead ends: 355 [2018-01-24 20:16:16,857 INFO L226 Difference]: Without dead ends: 234 [2018-01-24 20:16:16,857 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 20:16:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-01-24 20:16:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 140. [2018-01-24 20:16:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-01-24 20:16:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2018-01-24 20:16:16,869 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 28 [2018-01-24 20:16:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:16,869 INFO L432 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2018-01-24 20:16:16,869 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:16:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2018-01-24 20:16:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 20:16:16,870 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:16,871 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:16,871 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:16,871 INFO L82 PathProgramCache]: Analyzing trace with hash -215136023, now seen corresponding path program 1 times [2018-01-24 20:16:16,871 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:16,872 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:16,872 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:16,872 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:16,872 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:16,888 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:16:16,940 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:16,940 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:16:16,940 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:16,940 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:16:16,941 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:16:16,941 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:16:16,941 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 5 states. [2018-01-24 20:16:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:17,058 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2018-01-24 20:16:17,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:16:17,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-24 20:16:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:17,060 INFO L225 Difference]: With dead ends: 146 [2018-01-24 20:16:17,060 INFO L226 Difference]: Without dead ends: 137 [2018-01-24 20:16:17,061 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:16:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-01-24 20:16:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2018-01-24 20:16:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-01-24 20:16:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2018-01-24 20:16:17,067 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 29 [2018-01-24 20:16:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:17,067 INFO L432 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2018-01-24 20:16:17,067 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:16:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2018-01-24 20:16:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 20:16:17,068 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:17,069 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:17,069 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:17,069 INFO L82 PathProgramCache]: Analyzing trace with hash -215136022, now seen corresponding path program 1 times [2018-01-24 20:16:17,069 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:17,070 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:17,070 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:17,070 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:17,070 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:17,084 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:16:17,142 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:17,142 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:16:17,142 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:17,142 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:16:17,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:16:17,143 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:16:17,143 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand 5 states. [2018-01-24 20:16:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:17,348 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2018-01-24 20:16:17,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:16:17,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-24 20:16:17,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:17,350 INFO L225 Difference]: With dead ends: 220 [2018-01-24 20:16:17,350 INFO L226 Difference]: Without dead ends: 210 [2018-01-24 20:16:17,350 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 20:16:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-01-24 20:16:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 174. [2018-01-24 20:16:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-01-24 20:16:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 216 transitions. [2018-01-24 20:16:17,357 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 216 transitions. Word has length 29 [2018-01-24 20:16:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:17,357 INFO L432 AbstractCegarLoop]: Abstraction has 174 states and 216 transitions. [2018-01-24 20:16:17,358 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:16:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 216 transitions. [2018-01-24 20:16:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-24 20:16:17,358 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:17,359 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:17,359 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:17,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1844152872, now seen corresponding path program 1 times [2018-01-24 20:16:17,359 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:17,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:17,360 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:17,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:17,360 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:17,378 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:16:17,573 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:17,573 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:16:17,573 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:17,573 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:16:17,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:16:17,574 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:16:17,574 INFO L87 Difference]: Start difference. First operand 174 states and 216 transitions. Second operand 6 states. [2018-01-24 20:16:17,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:17,758 INFO L93 Difference]: Finished difference Result 329 states and 413 transitions. [2018-01-24 20:16:17,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:16:17,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-01-24 20:16:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:17,760 INFO L225 Difference]: With dead ends: 329 [2018-01-24 20:16:17,760 INFO L226 Difference]: Without dead ends: 202 [2018-01-24 20:16:17,761 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:16:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-01-24 20:16:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 183. [2018-01-24 20:16:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-01-24 20:16:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 226 transitions. [2018-01-24 20:16:17,771 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 226 transitions. Word has length 34 [2018-01-24 20:16:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:17,771 INFO L432 AbstractCegarLoop]: Abstraction has 183 states and 226 transitions. [2018-01-24 20:16:17,771 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:16:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 226 transitions. [2018-01-24 20:16:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-24 20:16:17,773 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:17,773 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:17,773 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:17,773 INFO L82 PathProgramCache]: Analyzing trace with hash -525574038, now seen corresponding path program 1 times [2018-01-24 20:16:17,773 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:17,774 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:17,774 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:17,775 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:17,775 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:17,794 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:16:18,105 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:18,106 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 20:16:18,106 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:18,106 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 20:16:18,106 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 20:16:18,107 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-01-24 20:16:18,107 INFO L87 Difference]: Start difference. First operand 183 states and 226 transitions. Second operand 11 states. [2018-01-24 20:16:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:18,734 INFO L93 Difference]: Finished difference Result 246 states and 291 transitions. [2018-01-24 20:16:18,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-24 20:16:18,734 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2018-01-24 20:16:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:18,735 INFO L225 Difference]: With dead ends: 246 [2018-01-24 20:16:18,735 INFO L226 Difference]: Without dead ends: 245 [2018-01-24 20:16:18,736 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-01-24 20:16:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-01-24 20:16:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 189. [2018-01-24 20:16:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-01-24 20:16:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 234 transitions. [2018-01-24 20:16:18,745 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 234 transitions. Word has length 36 [2018-01-24 20:16:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:18,745 INFO L432 AbstractCegarLoop]: Abstraction has 189 states and 234 transitions. [2018-01-24 20:16:18,745 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 20:16:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 234 transitions. [2018-01-24 20:16:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-24 20:16:18,746 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:18,746 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:18,746 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash -525574037, now seen corresponding path program 1 times [2018-01-24 20:16:18,746 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:18,747 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:18,747 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:18,747 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:18,747 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:18,766 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:16:19,121 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:19,121 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 20:16:19,121 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:19,121 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 20:16:19,121 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 20:16:19,121 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-01-24 20:16:19,122 INFO L87 Difference]: Start difference. First operand 189 states and 234 transitions. Second operand 11 states. [2018-01-24 20:16:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:19,602 INFO L93 Difference]: Finished difference Result 222 states and 265 transitions. [2018-01-24 20:16:19,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-24 20:16:19,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2018-01-24 20:16:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:19,604 INFO L225 Difference]: With dead ends: 222 [2018-01-24 20:16:19,604 INFO L226 Difference]: Without dead ends: 221 [2018-01-24 20:16:19,604 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2018-01-24 20:16:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-01-24 20:16:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 189. [2018-01-24 20:16:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-01-24 20:16:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 233 transitions. [2018-01-24 20:16:19,613 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 233 transitions. Word has length 36 [2018-01-24 20:16:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:19,614 INFO L432 AbstractCegarLoop]: Abstraction has 189 states and 233 transitions. [2018-01-24 20:16:19,614 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 20:16:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 233 transitions. [2018-01-24 20:16:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-24 20:16:19,615 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:19,615 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:19,615 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:19,615 INFO L82 PathProgramCache]: Analyzing trace with hash 887072562, now seen corresponding path program 1 times [2018-01-24 20:16:19,616 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:19,616 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:19,617 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:19,617 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:19,617 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:19,630 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:16:19,815 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:19,815 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 20:16:19,815 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:19,816 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 20:16:19,816 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 20:16:19,816 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:16:19,816 INFO L87 Difference]: Start difference. First operand 189 states and 233 transitions. Second operand 10 states. [2018-01-24 20:16:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:20,044 INFO L93 Difference]: Finished difference Result 209 states and 252 transitions. [2018-01-24 20:16:20,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-24 20:16:20,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-01-24 20:16:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:20,046 INFO L225 Difference]: With dead ends: 209 [2018-01-24 20:16:20,046 INFO L226 Difference]: Without dead ends: 206 [2018-01-24 20:16:20,046 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2018-01-24 20:16:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-01-24 20:16:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 189. [2018-01-24 20:16:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-01-24 20:16:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 232 transitions. [2018-01-24 20:16:20,055 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 232 transitions. Word has length 37 [2018-01-24 20:16:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:20,055 INFO L432 AbstractCegarLoop]: Abstraction has 189 states and 232 transitions. [2018-01-24 20:16:20,055 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 20:16:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 232 transitions. [2018-01-24 20:16:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 20:16:20,056 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:20,056 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:20,056 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:20,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1729495531, now seen corresponding path program 1 times [2018-01-24 20:16:20,056 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:20,057 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:20,057 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:20,057 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:20,057 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:20,070 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:16:20,377 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:20,377 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 20:16:20,377 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:20,378 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 20:16:20,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 20:16:20,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-01-24 20:16:20,378 INFO L87 Difference]: Start difference. First operand 189 states and 232 transitions. Second operand 11 states. [2018-01-24 20:16:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:20,755 INFO L93 Difference]: Finished difference Result 242 states and 287 transitions. [2018-01-24 20:16:20,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-24 20:16:20,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-01-24 20:16:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:20,757 INFO L225 Difference]: With dead ends: 242 [2018-01-24 20:16:20,757 INFO L226 Difference]: Without dead ends: 241 [2018-01-24 20:16:20,757 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2018-01-24 20:16:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-01-24 20:16:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 191. [2018-01-24 20:16:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-01-24 20:16:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2018-01-24 20:16:20,768 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 38 [2018-01-24 20:16:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:20,768 INFO L432 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2018-01-24 20:16:20,769 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 20:16:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2018-01-24 20:16:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 20:16:20,769 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:20,770 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:20,770 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:20,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1729495532, now seen corresponding path program 1 times [2018-01-24 20:16:20,770 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:20,771 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:20,771 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:20,771 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:20,771 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:20,782 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 20:16:20,824 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:16:20,825 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:16:20,825 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:16:20,825 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:16:20,825 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:16:20,825 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:16:20,826 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand 4 states. [2018-01-24 20:16:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:16:20,990 INFO L93 Difference]: Finished difference Result 247 states and 305 transitions. [2018-01-24 20:16:20,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:16:20,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2018-01-24 20:16:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:16:20,992 INFO L225 Difference]: With dead ends: 247 [2018-01-24 20:16:20,992 INFO L226 Difference]: Without dead ends: 244 [2018-01-24 20:16:20,992 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 20:16:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-01-24 20:16:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 197. [2018-01-24 20:16:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-01-24 20:16:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 247 transitions. [2018-01-24 20:16:21,000 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 247 transitions. Word has length 38 [2018-01-24 20:16:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:16:21,000 INFO L432 AbstractCegarLoop]: Abstraction has 197 states and 247 transitions. [2018-01-24 20:16:21,000 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:16:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 247 transitions. [2018-01-24 20:16:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-24 20:16:21,001 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:16:21,001 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:16:21,001 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr58EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:16:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash 973830348, now seen corresponding path program 1 times [2018-01-24 20:16:21,002 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:16:21,002 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:21,003 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:16:21,003 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:16:21,003 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:16:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:16:21,015 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:16:21,640 WARN L146 SmtUtils]: Spent 258ms on a formula simplification. DAG size of input: 40 DAG size of output 27 [2018-01-24 20:16:21,840 WARN L146 SmtUtils]: Spent 144ms on a formula simplification. DAG size of input: 64 DAG size of output 39 [2018-01-24 20:16:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:16:22,090 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:16:22,090 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:16:22,091 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-01-24 20:16:22,093 INFO L201 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [12], [13], [18], [20], [23], [24], [27], [28], [29], [44], [45], [48], [50], [53], [60], [64], [66], [71], [170], [173], [174], [180], [186], [187], [188], [190], [191], [200], [201], [205], [206], [207] [2018-01-24 20:16:22,155 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:16:22,155 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