java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 21:00:20,929 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 21:00:20,931 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 21:00:20,947 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 21:00:20,947 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 21:00:20,948 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 21:00:20,949 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 21:00:20,950 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 21:00:20,952 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 21:00:20,953 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 21:00:20,954 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 21:00:20,954 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 21:00:20,955 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 21:00:20,957 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 21:00:20,957 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 21:00:20,960 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 21:00:20,962 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 21:00:20,964 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 21:00:20,965 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 21:00:20,967 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 21:00:20,969 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 21:00:20,969 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 21:00:20,970 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 21:00:20,971 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 21:00:20,971 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 21:00:20,973 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 21:00:20,973 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 21:00:20,974 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 21:00:20,974 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 21:00:20,974 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 21:00:20,975 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 21:00:20,975 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 21:00:20,984 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 21:00:20,984 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 21:00:20,985 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 21:00:20,985 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 21:00:20,985 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 21:00:20,985 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 21:00:20,985 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 21:00:20,985 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 21:00:20,985 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 21:00:20,986 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 21:00:20,986 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 21:00:20,986 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 21:00:20,987 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 21:00:20,987 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 21:00:20,987 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 21:00:20,987 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 21:00:20,987 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 21:00:20,987 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 21:00:20,987 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 21:00:20,987 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 21:00:20,988 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 21:00:20,988 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 21:00:20,988 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 21:00:20,988 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 21:00:20,988 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 21:00:20,989 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 21:00:20,989 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 21:00:20,989 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 21:00:20,989 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 21:00:20,989 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 21:00:20,989 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 21:00:20,989 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 21:00:20,989 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 21:00:20,990 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 21:00:20,990 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 21:00:20,990 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 21:00:20,990 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 21:00:21,023 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 21:00:21,032 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 21:00:21,035 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 21:00:21,036 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 21:00:21,036 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 21:00:21,037 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-24 21:00:21,191 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 21:00:21,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 21:00:21,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 21:00:21,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 21:00:21,201 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 21:00:21,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 09:00:21" (1/1) ... [2018-01-24 21:00:21,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ea857c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21, skipping insertion in model container [2018-01-24 21:00:21,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 09:00:21" (1/1) ... [2018-01-24 21:00:21,218 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 21:00:21,256 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 21:00:21,375 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 21:00:21,395 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 21:00:21,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21 WrapperNode [2018-01-24 21:00:21,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 21:00:21,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 21:00:21,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 21:00:21,408 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 21:00:21,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21" (1/1) ... [2018-01-24 21:00:21,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21" (1/1) ... [2018-01-24 21:00:21,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21" (1/1) ... [2018-01-24 21:00:21,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21" (1/1) ... [2018-01-24 21:00:21,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21" (1/1) ... [2018-01-24 21:00:21,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21" (1/1) ... [2018-01-24 21:00:21,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21" (1/1) ... [2018-01-24 21:00:21,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 21:00:21,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 21:00:21,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 21:00:21,440 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 21:00:21,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21" (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 21:00:21,488 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 21:00:21,488 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 21:00:21,488 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 21:00:21,488 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 21:00:21,489 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 21:00:21,489 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 21:00:21,489 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 21:00:21,489 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 21:00:21,489 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 21:00:21,489 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 21:00:21,490 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 21:00:21,490 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 21:00:21,490 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 21:00:21,490 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 21:00:21,490 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 21:00:21,490 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 21:00:21,491 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 21:00:21,963 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 21:00:21,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 09:00:21 BoogieIcfgContainer [2018-01-24 21:00:21,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 21:00:21,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 21:00:21,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 21:00:21,966 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 21:00:21,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 09:00:21" (1/3) ... [2018-01-24 21:00:21,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e217f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 09:00:21, skipping insertion in model container [2018-01-24 21:00:21,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:21" (2/3) ... [2018-01-24 21:00:21,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e217f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 09:00:21, skipping insertion in model container [2018-01-24 21:00:21,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 09:00:21" (3/3) ... [2018-01-24 21:00:21,969 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-24 21:00:21,975 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 21:00:21,980 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 63 error locations. [2018-01-24 21:00:22,023 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 21:00:22,024 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 21:00:22,024 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 21:00:22,024 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 21:00:22,024 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 21:00:22,024 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 21:00:22,024 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 21:00:22,024 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 21:00:22,025 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 21:00:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2018-01-24 21:00:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 21:00:22,048 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:22,050 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:22,050 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash 437540254, now seen corresponding path program 1 times [2018-01-24 21:00:22,056 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:22,096 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:22,097 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:22,097 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:22,097 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:22,139 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:22,199 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 21:00:22,201 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:22,201 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:00:22,202 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:22,204 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:00:22,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:00:22,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:00:22,293 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 4 states. [2018-01-24 21:00:22,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:22,543 INFO L93 Difference]: Finished difference Result 227 states and 260 transitions. [2018-01-24 21:00:22,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 21:00:22,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 21:00:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:22,557 INFO L225 Difference]: With dead ends: 227 [2018-01-24 21:00:22,557 INFO L226 Difference]: Without dead ends: 154 [2018-01-24 21:00:22,561 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 21:00:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-01-24 21:00:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2018-01-24 21:00:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-24 21:00:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2018-01-24 21:00:22,605 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 8 [2018-01-24 21:00:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:22,606 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2018-01-24 21:00:22,606 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:00:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2018-01-24 21:00:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 21:00:22,606 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:22,607 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:22,607 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:22,607 INFO L82 PathProgramCache]: Analyzing trace with hash 437540255, now seen corresponding path program 1 times [2018-01-24 21:00:22,607 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:22,608 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:22,608 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:22,609 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:22,609 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:22,625 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:22,742 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 21:00:22,742 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:22,743 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:00:22,743 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:22,744 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:00:22,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:00:22,745 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:00:22,745 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand 4 states. [2018-01-24 21:00:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:23,020 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2018-01-24 21:00:23,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 21:00:23,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 21:00:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:23,022 INFO L225 Difference]: With dead ends: 138 [2018-01-24 21:00:23,023 INFO L226 Difference]: Without dead ends: 130 [2018-01-24 21:00:23,024 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 21:00:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-24 21:00:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2018-01-24 21:00:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-01-24 21:00:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2018-01-24 21:00:23,037 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 8 [2018-01-24 21:00:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:23,038 INFO L432 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2018-01-24 21:00:23,038 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:00:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2018-01-24 21:00:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 21:00:23,039 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:23,039 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:23,039 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1223362610, now seen corresponding path program 1 times [2018-01-24 21:00:23,040 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:23,041 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:23,041 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:23,041 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:23,041 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:23,063 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:23,112 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 21:00:23,113 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:23,113 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 21:00:23,113 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:23,114 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 21:00:23,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 21:00:23,114 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:23,114 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 5 states. [2018-01-24 21:00:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:23,433 INFO L93 Difference]: Finished difference Result 271 states and 295 transitions. [2018-01-24 21:00:23,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 21:00:23,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 21:00:23,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:23,466 INFO L225 Difference]: With dead ends: 271 [2018-01-24 21:00:23,466 INFO L226 Difference]: Without dead ends: 270 [2018-01-24 21:00:23,467 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 21:00:23,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-01-24 21:00:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 124. [2018-01-24 21:00:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-24 21:00:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 135 transitions. [2018-01-24 21:00:23,478 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 135 transitions. Word has length 15 [2018-01-24 21:00:23,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:23,479 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 135 transitions. [2018-01-24 21:00:23,479 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 21:00:23,479 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 135 transitions. [2018-01-24 21:00:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 21:00:23,480 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:23,480 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:23,480 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:23,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1223362609, now seen corresponding path program 1 times [2018-01-24 21:00:23,481 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:23,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:23,482 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:23,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:23,482 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:23,502 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:23,577 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 21:00:23,577 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:23,578 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 21:00:23,578 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:23,578 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 21:00:23,578 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 21:00:23,579 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:23,579 INFO L87 Difference]: Start difference. First operand 124 states and 135 transitions. Second operand 5 states. [2018-01-24 21:00:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:23,899 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2018-01-24 21:00:23,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 21:00:23,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 21:00:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:23,901 INFO L225 Difference]: With dead ends: 226 [2018-01-24 21:00:23,901 INFO L226 Difference]: Without dead ends: 225 [2018-01-24 21:00:23,901 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 21:00:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-01-24 21:00:23,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 123. [2018-01-24 21:00:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-01-24 21:00:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2018-01-24 21:00:23,912 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 15 [2018-01-24 21:00:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:23,912 INFO L432 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2018-01-24 21:00:23,913 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 21:00:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2018-01-24 21:00:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 21:00:23,914 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:23,914 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:23,914 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1355242881, now seen corresponding path program 1 times [2018-01-24 21:00:23,914 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:23,915 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:23,916 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:23,916 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:23,916 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:23,933 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:23,996 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 21:00:23,997 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:23,997 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:00:23,997 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:23,997 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:00:23,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:00:23,998 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:00:23,998 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 4 states. [2018-01-24 21:00:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:24,122 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-01-24 21:00:24,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 21:00:24,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-01-24 21:00:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:24,123 INFO L225 Difference]: With dead ends: 143 [2018-01-24 21:00:24,123 INFO L226 Difference]: Without dead ends: 127 [2018-01-24 21:00:24,124 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 21:00:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-01-24 21:00:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2018-01-24 21:00:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-24 21:00:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2018-01-24 21:00:24,135 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 19 [2018-01-24 21:00:24,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:24,136 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2018-01-24 21:00:24,136 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:00:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2018-01-24 21:00:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 21:00:24,137 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:24,137 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:24,137 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:24,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1355242882, now seen corresponding path program 1 times [2018-01-24 21:00:24,137 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:24,138 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:24,138 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:24,138 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:24,138 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:24,153 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:24,218 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 21:00:24,219 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:24,219 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 21:00:24,219 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:24,219 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 21:00:24,220 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 21:00:24,220 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:24,220 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 5 states. [2018-01-24 21:00:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:24,386 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2018-01-24 21:00:24,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 21:00:24,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-01-24 21:00:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:24,387 INFO L225 Difference]: With dead ends: 175 [2018-01-24 21:00:24,387 INFO L226 Difference]: Without dead ends: 164 [2018-01-24 21:00:24,388 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 21:00:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-01-24 21:00:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2018-01-24 21:00:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-01-24 21:00:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2018-01-24 21:00:24,399 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 19 [2018-01-24 21:00:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:24,400 INFO L432 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2018-01-24 21:00:24,400 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 21:00:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2018-01-24 21:00:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 21:00:24,401 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:24,401 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:24,401 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1348114365, now seen corresponding path program 1 times [2018-01-24 21:00:24,402 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:24,403 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:24,403 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:24,403 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:24,403 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:24,417 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:24,484 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 21:00:24,484 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:24,484 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 21:00:24,485 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:24,485 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:00:24,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:00:24,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:00:24,486 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand 6 states. [2018-01-24 21:00:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:24,754 INFO L93 Difference]: Finished difference Result 212 states and 246 transitions. [2018-01-24 21:00:24,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 21:00:24,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-01-24 21:00:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:24,756 INFO L225 Difference]: With dead ends: 212 [2018-01-24 21:00:24,756 INFO L226 Difference]: Without dead ends: 211 [2018-01-24 21:00:24,756 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:00:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-01-24 21:00:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 146. [2018-01-24 21:00:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-01-24 21:00:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 169 transitions. [2018-01-24 21:00:24,764 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 169 transitions. Word has length 22 [2018-01-24 21:00:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:24,765 INFO L432 AbstractCegarLoop]: Abstraction has 146 states and 169 transitions. [2018-01-24 21:00:24,765 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:00:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 169 transitions. [2018-01-24 21:00:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 21:00:24,766 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:24,766 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:24,766 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1348114366, now seen corresponding path program 1 times [2018-01-24 21:00:24,766 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:24,767 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:24,767 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:24,767 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:24,767 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:24,782 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:24,863 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 21:00:24,864 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:24,864 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 21:00:24,864 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:24,864 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:00:24,864 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:00:24,864 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:00:24,865 INFO L87 Difference]: Start difference. First operand 146 states and 169 transitions. Second operand 6 states. [2018-01-24 21:00:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:25,270 INFO L93 Difference]: Finished difference Result 232 states and 272 transitions. [2018-01-24 21:00:25,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 21:00:25,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-01-24 21:00:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:25,272 INFO L225 Difference]: With dead ends: 232 [2018-01-24 21:00:25,273 INFO L226 Difference]: Without dead ends: 222 [2018-01-24 21:00:25,273 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-01-24 21:00:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-01-24 21:00:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 130. [2018-01-24 21:00:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-01-24 21:00:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2018-01-24 21:00:25,284 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 22 [2018-01-24 21:00:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:25,284 INFO L432 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2018-01-24 21:00:25,284 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:00:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2018-01-24 21:00:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 21:00:25,286 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:25,287 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:25,287 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1821397366, now seen corresponding path program 1 times [2018-01-24 21:00:25,287 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:25,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,288 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:25,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,288 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:25,298 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:25,344 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 21:00:25,344 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:25,344 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 21:00:25,344 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:25,345 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 21:00:25,345 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 21:00:25,345 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:25,345 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand 5 states. [2018-01-24 21:00:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:25,539 INFO L93 Difference]: Finished difference Result 183 states and 209 transitions. [2018-01-24 21:00:25,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 21:00:25,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-24 21:00:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:25,540 INFO L225 Difference]: With dead ends: 183 [2018-01-24 21:00:25,541 INFO L226 Difference]: Without dead ends: 148 [2018-01-24 21:00:25,541 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 21:00:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-01-24 21:00:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 130. [2018-01-24 21:00:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-01-24 21:00:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 150 transitions. [2018-01-24 21:00:25,551 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 150 transitions. Word has length 25 [2018-01-24 21:00:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:25,552 INFO L432 AbstractCegarLoop]: Abstraction has 130 states and 150 transitions. [2018-01-24 21:00:25,552 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 21:00:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 150 transitions. [2018-01-24 21:00:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 21:00:25,553 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:25,553 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:25,553 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 203248485, now seen corresponding path program 1 times [2018-01-24 21:00:25,554 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:25,555 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,555 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:25,555 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,555 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:25,567 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:25,600 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 21:00:25,600 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:25,600 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 21:00:25,600 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:25,601 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:00:25,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:00:25,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:00:25,601 INFO L87 Difference]: Start difference. First operand 130 states and 150 transitions. Second operand 4 states. [2018-01-24 21:00:25,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:25,652 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2018-01-24 21:00:25,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 21:00:25,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-01-24 21:00:25,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:25,653 INFO L225 Difference]: With dead ends: 230 [2018-01-24 21:00:25,654 INFO L226 Difference]: Without dead ends: 156 [2018-01-24 21:00:25,654 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-24 21:00:25,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2018-01-24 21:00:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-01-24 21:00:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2018-01-24 21:00:25,666 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 28 [2018-01-24 21:00:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:25,667 INFO L432 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2018-01-24 21:00:25,667 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:00:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2018-01-24 21:00:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 21:00:25,669 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:25,669 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:25,669 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1370430932, now seen corresponding path program 1 times [2018-01-24 21:00:25,670 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:25,671 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,671 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:25,671 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,671 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:25,689 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:25,738 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 21:00:25,739 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:25,739 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 21:00:25,739 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:25,739 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 21:00:25,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 21:00:25,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:25,740 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand 5 states. [2018-01-24 21:00:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:26,001 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2018-01-24 21:00:26,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 21:00:26,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-24 21:00:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:26,004 INFO L225 Difference]: With dead ends: 233 [2018-01-24 21:00:26,004 INFO L226 Difference]: Without dead ends: 232 [2018-01-24 21:00:26,005 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 21:00:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-01-24 21:00:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 133. [2018-01-24 21:00:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-24 21:00:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2018-01-24 21:00:26,017 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 29 [2018-01-24 21:00:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:26,017 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2018-01-24 21:00:26,017 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 21:00:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2018-01-24 21:00:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 21:00:26,018 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:26,019 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:26,019 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:26,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1370430931, now seen corresponding path program 1 times [2018-01-24 21:00:26,019 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:26,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:26,020 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:26,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:26,020 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:26,037 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:26,111 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 21:00:26,111 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:26,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 21:00:26,112 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:26,112 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 21:00:26,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 21:00:26,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:26,113 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand 5 states. [2018-01-24 21:00:26,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:26,416 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2018-01-24 21:00:26,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 21:00:26,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-24 21:00:26,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:26,417 INFO L225 Difference]: With dead ends: 239 [2018-01-24 21:00:26,417 INFO L226 Difference]: Without dead ends: 238 [2018-01-24 21:00:26,417 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 21:00:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-01-24 21:00:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 132. [2018-01-24 21:00:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-01-24 21:00:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2018-01-24 21:00:26,425 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 29 [2018-01-24 21:00:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:26,425 INFO L432 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2018-01-24 21:00:26,425 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 21:00:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2018-01-24 21:00:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 21:00:26,426 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:26,426 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:26,426 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:26,427 INFO L82 PathProgramCache]: Analyzing trace with hash 811222786, now seen corresponding path program 1 times [2018-01-24 21:00:26,427 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:26,428 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:26,428 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:26,428 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:26,428 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:26,439 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:26,799 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 21:00:26,799 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:26,799 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 21:00:26,799 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:26,800 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 21:00:26,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 21:00:26,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-01-24 21:00:26,800 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand 10 states. [2018-01-24 21:00:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:27,211 INFO L93 Difference]: Finished difference Result 240 states and 274 transitions. [2018-01-24 21:00:27,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 21:00:27,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-01-24 21:00:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:27,212 INFO L225 Difference]: With dead ends: 240 [2018-01-24 21:00:27,213 INFO L226 Difference]: Without dead ends: 239 [2018-01-24 21:00:27,213 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-01-24 21:00:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-01-24 21:00:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 149. [2018-01-24 21:00:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-01-24 21:00:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 173 transitions. [2018-01-24 21:00:27,230 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 173 transitions. Word has length 30 [2018-01-24 21:00:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:27,230 INFO L432 AbstractCegarLoop]: Abstraction has 149 states and 173 transitions. [2018-01-24 21:00:27,230 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 21:00:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 173 transitions. [2018-01-24 21:00:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 21:00:27,232 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:27,232 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:27,232 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:27,232 INFO L82 PathProgramCache]: Analyzing trace with hash 811222787, now seen corresponding path program 1 times [2018-01-24 21:00:27,232 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:27,233 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,233 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:27,233 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,234 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:27,247 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:27,421 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 21:00:27,422 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:27,422 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 21:00:27,422 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:27,422 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 21:00:27,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 21:00:27,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:00:27,423 INFO L87 Difference]: Start difference. First operand 149 states and 173 transitions. Second operand 9 states. [2018-01-24 21:00:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:27,946 INFO L93 Difference]: Finished difference Result 294 states and 336 transitions. [2018-01-24 21:00:27,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 21:00:27,947 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-01-24 21:00:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:27,948 INFO L225 Difference]: With dead ends: 294 [2018-01-24 21:00:27,948 INFO L226 Difference]: Without dead ends: 218 [2018-01-24 21:00:27,949 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2018-01-24 21:00:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-01-24 21:00:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 145. [2018-01-24 21:00:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-01-24 21:00:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2018-01-24 21:00:27,959 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 30 [2018-01-24 21:00:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:27,960 INFO L432 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2018-01-24 21:00:27,960 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 21:00:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2018-01-24 21:00:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-24 21:00:27,960 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:27,960 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:27,960 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:27,961 INFO L82 PathProgramCache]: Analyzing trace with hash -518752177, now seen corresponding path program 1 times [2018-01-24 21:00:27,961 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:27,961 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,962 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:27,962 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,962 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:27,979 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:28,097 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:28,097 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 21:00:28,097 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:28,098 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 21:00:28,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 21:00:28,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:00:28,098 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand 9 states. [2018-01-24 21:00:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:28,722 INFO L93 Difference]: Finished difference Result 399 states and 455 transitions. [2018-01-24 21:00:28,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-24 21:00:28,723 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-01-24 21:00:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:28,725 INFO L225 Difference]: With dead ends: 399 [2018-01-24 21:00:28,726 INFO L226 Difference]: Without dead ends: 398 [2018-01-24 21:00:28,727 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2018-01-24 21:00:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-01-24 21:00:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 161. [2018-01-24 21:00:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-01-24 21:00:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 187 transitions. [2018-01-24 21:00:28,751 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 187 transitions. Word has length 33 [2018-01-24 21:00:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:28,752 INFO L432 AbstractCegarLoop]: Abstraction has 161 states and 187 transitions. [2018-01-24 21:00:28,752 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 21:00:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 187 transitions. [2018-01-24 21:00:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-24 21:00:28,753 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:28,754 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:28,754 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash -518752176, now seen corresponding path program 1 times [2018-01-24 21:00:28,754 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:28,755 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:28,755 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:28,755 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:28,756 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:28,772 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:28,989 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 21:00:28,989 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:28,989 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 21:00:28,990 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:28,990 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 21:00:28,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 21:00:28,993 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:00:28,994 INFO L87 Difference]: Start difference. First operand 161 states and 187 transitions. Second operand 9 states. [2018-01-24 21:00:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:29,850 INFO L93 Difference]: Finished difference Result 312 states and 355 transitions. [2018-01-24 21:00:29,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-24 21:00:29,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-01-24 21:00:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:29,851 INFO L225 Difference]: With dead ends: 312 [2018-01-24 21:00:29,851 INFO L226 Difference]: Without dead ends: 311 [2018-01-24 21:00:29,852 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-01-24 21:00:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-01-24 21:00:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 161. [2018-01-24 21:00:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-01-24 21:00:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2018-01-24 21:00:29,862 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 33 [2018-01-24 21:00:29,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:29,863 INFO L432 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2018-01-24 21:00:29,863 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 21:00:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2018-01-24 21:00:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-24 21:00:29,863 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:29,863 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:29,864 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1613392636, now seen corresponding path program 1 times [2018-01-24 21:00:29,864 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:29,865 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:29,865 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:29,865 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:29,865 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:29,872 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:29,886 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:29,886 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 21:00:29,886 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:29,887 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:00:29,887 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:00:29,887 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:00:29,887 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand 4 states. [2018-01-24 21:00:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:29,945 INFO L93 Difference]: Finished difference Result 241 states and 278 transitions. [2018-01-24 21:00:29,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 21:00:29,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-01-24 21:00:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:29,947 INFO L225 Difference]: With dead ends: 241 [2018-01-24 21:00:29,947 INFO L226 Difference]: Without dead ends: 172 [2018-01-24 21:00:29,947 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-01-24 21:00:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2018-01-24 21:00:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-01-24 21:00:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2018-01-24 21:00:29,957 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 36 [2018-01-24 21:00:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:29,957 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2018-01-24 21:00:29,957 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:00:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2018-01-24 21:00:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 21:00:29,958 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:29,958 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:29,958 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:29,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1298991553, now seen corresponding path program 1 times [2018-01-24 21:00:29,958 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:29,959 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:29,959 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:29,959 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:29,960 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:29,968 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:30,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 21:00:30,100 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 21:00:30,101 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-01-24 21:00:30,102 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [24], [35], [36], [39], [43], [47], [49], [52], [107], [111], [117], [121], [122], [123], [125], [134], [136], [148], [150], [155], [156], [159], [165], [169], [175], [178], [222], [223], [227], [228], [229] [2018-01-24 21:00:30,152 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 21:00:30,152 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