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_preciseopt.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 03:50:30,959 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 03:50:30,960 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 03:50:30,976 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 03:50:30,977 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 03:50:30,978 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 03:50:30,979 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 03:50:30,980 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 03:50:30,982 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 03:50:30,983 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 03:50:30,984 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 03:50:30,984 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 03:50:30,984 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 03:50:30,985 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 03:50:30,986 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 03:50:30,988 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 03:50:30,991 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 03:50:30,993 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 03:50:30,994 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 03:50:30,995 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 03:50:30,998 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 03:50:30,998 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 03:50:30,998 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 03:50:30,999 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 03:50:31,000 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 03:50:31,002 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 03:50:31,002 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 03:50:31,002 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 03:50:31,003 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 03:50:31,003 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 03:50:31,003 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 03:50:31,004 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_preciseopt.epf [2018-01-25 03:50:31,014 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 03:50:31,014 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 03:50:31,015 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 03:50:31,015 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 03:50:31,015 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 03:50:31,015 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 03:50:31,016 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 03:50:31,016 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 03:50:31,016 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 03:50:31,017 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 03:50:31,017 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 03:50:31,017 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 03:50:31,017 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 03:50:31,017 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 03:50:31,018 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 03:50:31,018 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 03:50:31,018 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 03:50:31,018 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 03:50:31,018 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 03:50:31,018 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 03:50:31,019 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 03:50:31,019 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 03:50:31,019 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 03:50:31,019 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 03:50:31,019 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 03:50:31,020 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 03:50:31,020 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 03:50:31,020 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 03:50:31,020 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 03:50:31,021 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 03:50:31,021 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 03:50:31,021 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 03:50:31,021 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 03:50:31,021 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 03:50:31,021 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 03:50:31,022 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 03:50:31,022 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 03:50:31,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 03:50:31,069 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 03:50:31,073 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 03:50:31,075 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 03:50:31,075 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 03:50:31,076 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-25 03:50:31,307 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 03:50:31,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 03:50:31,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 03:50:31,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 03:50:31,319 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 03:50:31,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:50:31" (1/1) ... [2018-01-25 03:50:31,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b6da95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31, skipping insertion in model container [2018-01-25 03:50:31,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:50:31" (1/1) ... [2018-01-25 03:50:31,341 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:50:31,385 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:50:31,552 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:50:31,576 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:50:31,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31 WrapperNode [2018-01-25 03:50:31,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 03:50:31,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 03:50:31,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 03:50:31,588 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 03:50:31,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31" (1/1) ... [2018-01-25 03:50:31,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31" (1/1) ... [2018-01-25 03:50:31,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31" (1/1) ... [2018-01-25 03:50:31,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31" (1/1) ... [2018-01-25 03:50:31,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31" (1/1) ... [2018-01-25 03:50:31,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31" (1/1) ... [2018-01-25 03:50:31,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31" (1/1) ... [2018-01-25 03:50:31,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 03:50:31,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 03:50:31,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 03:50:31,633 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 03:50:31,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 03:50:31,685 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 03:50:31,686 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 03:50:31,686 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 03:50:31,686 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 03:50:31,686 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 03:50:31,686 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-25 03:50:31,686 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-25 03:50:31,686 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 03:50:31,686 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 03:50:31,686 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 03:50:31,687 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-25 03:50:31,687 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 03:50:31,687 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 03:50:31,687 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-25 03:50:31,687 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 03:50:31,687 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 03:50:31,687 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 03:50:32,227 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 03:50:32,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:50:32 BoogieIcfgContainer [2018-01-25 03:50:32,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 03:50:32,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 03:50:32,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 03:50:32,232 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 03:50:32,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 03:50:31" (1/3) ... [2018-01-25 03:50:32,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82f259e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 03:50:32, skipping insertion in model container [2018-01-25 03:50:32,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:50:31" (2/3) ... [2018-01-25 03:50:32,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82f259e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 03:50:32, skipping insertion in model container [2018-01-25 03:50:32,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:50:32" (3/3) ... [2018-01-25 03:50:32,236 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-25 03:50:32,246 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 03:50:32,254 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 63 error locations. [2018-01-25 03:50:32,316 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 03:50:32,317 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 03:50:32,317 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 03:50:32,317 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 03:50:32,317 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 03:50:32,317 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 03:50:32,318 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 03:50:32,318 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 03:50:32,319 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 03:50:32,354 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2018-01-25 03:50:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-25 03:50:32,361 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:32,362 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:50:32,362 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]=== [2018-01-25 03:50:32,368 INFO L82 PathProgramCache]: Analyzing trace with hash 437540254, now seen corresponding path program 1 times [2018-01-25 03:50:32,371 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:32,435 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:32,435 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:32,435 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:32,436 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:32,492 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:32,588 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:32,588 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 03:50:32,588 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:32,592 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 03:50:32,607 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 03:50:32,608 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 03:50:32,610 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 4 states. [2018-01-25 03:50:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:32,947 INFO L93 Difference]: Finished difference Result 227 states and 260 transitions. [2018-01-25 03:50:32,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:50:32,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-25 03:50:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:32,960 INFO L225 Difference]: With dead ends: 227 [2018-01-25 03:50:32,961 INFO L226 Difference]: Without dead ends: 154 [2018-01-25 03:50:32,965 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-01-25 03:50:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2018-01-25 03:50:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-25 03:50:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2018-01-25 03:50:33,007 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 8 [2018-01-25 03:50:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:33,008 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2018-01-25 03:50:33,008 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 03:50:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2018-01-25 03:50:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-25 03:50:33,008 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:33,009 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:50:33,009 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]=== [2018-01-25 03:50:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash 437540255, now seen corresponding path program 1 times [2018-01-25 03:50:33,009 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:33,010 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:33,010 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:33,011 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:33,011 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:33,028 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:33,111 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:33,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 03:50:33,111 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:33,113 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 03:50:33,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 03:50:33,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 03:50:33,114 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand 4 states. [2018-01-25 03:50:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:33,285 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2018-01-25 03:50:33,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 03:50:33,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-25 03:50:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:33,288 INFO L225 Difference]: With dead ends: 138 [2018-01-25 03:50:33,288 INFO L226 Difference]: Without dead ends: 130 [2018-01-25 03:50:33,292 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-25 03:50:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2018-01-25 03:50:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-01-25 03:50:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2018-01-25 03:50:33,307 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 8 [2018-01-25 03:50:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:33,307 INFO L432 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2018-01-25 03:50:33,307 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 03:50:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2018-01-25 03:50:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-25 03:50:33,308 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:33,308 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:50:33,309 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]=== [2018-01-25 03:50:33,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1223362610, now seen corresponding path program 1 times [2018-01-25 03:50:33,309 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:33,310 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:33,310 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:33,310 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:33,310 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:33,330 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:33,386 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:33,386 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:50:33,386 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:33,387 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:50:33,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:50:33,387 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:33,387 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 5 states. [2018-01-25 03:50:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:33,723 INFO L93 Difference]: Finished difference Result 271 states and 295 transitions. [2018-01-25 03:50:33,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 03:50:33,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-25 03:50:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:33,726 INFO L225 Difference]: With dead ends: 271 [2018-01-25 03:50:33,727 INFO L226 Difference]: Without dead ends: 270 [2018-01-25 03:50:33,727 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 [2018-01-25 03:50:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-01-25 03:50:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 124. [2018-01-25 03:50:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-25 03:50:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 135 transitions. [2018-01-25 03:50:33,742 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 135 transitions. Word has length 15 [2018-01-25 03:50:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:33,743 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 135 transitions. [2018-01-25 03:50:33,743 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:50:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 135 transitions. [2018-01-25 03:50:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-25 03:50:33,744 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:33,744 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:50:33,744 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]=== [2018-01-25 03:50:33,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1223362609, now seen corresponding path program 1 times [2018-01-25 03:50:33,745 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:33,746 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:33,746 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:33,746 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:33,746 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:33,768 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:33,835 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:33,835 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:50:33,836 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:33,836 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:50:33,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:50:33,837 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:33,837 INFO L87 Difference]: Start difference. First operand 124 states and 135 transitions. Second operand 5 states. [2018-01-25 03:50:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:34,235 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2018-01-25 03:50:34,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 03:50:34,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-25 03:50:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:34,236 INFO L225 Difference]: With dead ends: 226 [2018-01-25 03:50:34,237 INFO L226 Difference]: Without dead ends: 225 [2018-01-25 03:50:34,237 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 [2018-01-25 03:50:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-01-25 03:50:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 123. [2018-01-25 03:50:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-01-25 03:50:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2018-01-25 03:50:34,247 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 15 [2018-01-25 03:50:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:34,248 INFO L432 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2018-01-25 03:50:34,248 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:50:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2018-01-25 03:50:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 03:50:34,249 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:34,249 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:50:34,249 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]=== [2018-01-25 03:50:34,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1355242881, now seen corresponding path program 1 times [2018-01-25 03:50:34,249 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:34,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:34,250 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:34,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:34,251 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:34,267 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:34,335 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:34,335 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 03:50:34,336 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:34,336 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 03:50:34,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 03:50:34,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 03:50:34,336 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 4 states. [2018-01-25 03:50:34,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:34,479 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-01-25 03:50:34,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:50:34,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-01-25 03:50:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:34,480 INFO L225 Difference]: With dead ends: 143 [2018-01-25 03:50:34,480 INFO L226 Difference]: Without dead ends: 127 [2018-01-25 03:50:34,480 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 [2018-01-25 03:50:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-01-25 03:50:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2018-01-25 03:50:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-25 03:50:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2018-01-25 03:50:34,492 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 19 [2018-01-25 03:50:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:34,493 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2018-01-25 03:50:34,493 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 03:50:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2018-01-25 03:50:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 03:50:34,494 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:34,494 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:50:34,494 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]=== [2018-01-25 03:50:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1355242882, now seen corresponding path program 1 times [2018-01-25 03:50:34,494 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:34,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:34,495 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:34,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:34,495 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:34,511 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:34,578 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:34,578 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:50:34,578 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:34,578 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:50:34,579 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:50:34,579 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:34,579 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 5 states. [2018-01-25 03:50:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:34,725 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2018-01-25 03:50:34,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:50:34,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-01-25 03:50:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:34,731 INFO L225 Difference]: With dead ends: 175 [2018-01-25 03:50:34,732 INFO L226 Difference]: Without dead ends: 164 [2018-01-25 03:50:34,732 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 [2018-01-25 03:50:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-01-25 03:50:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2018-01-25 03:50:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-01-25 03:50:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2018-01-25 03:50:34,742 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 19 [2018-01-25 03:50:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:34,743 INFO L432 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2018-01-25 03:50:34,743 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:50:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2018-01-25 03:50:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-25 03:50:34,743 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:34,744 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] [2018-01-25 03:50:34,744 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]=== [2018-01-25 03:50:34,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1348114365, now seen corresponding path program 1 times [2018-01-25 03:50:34,744 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:34,745 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:34,745 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:34,745 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:34,745 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:34,760 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:34,864 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:34,864 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 03:50:34,864 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:34,865 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 03:50:34,865 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 03:50:34,865 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 03:50:34,865 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand 6 states. [2018-01-25 03:50:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:35,130 INFO L93 Difference]: Finished difference Result 212 states and 246 transitions. [2018-01-25 03:50:35,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 03:50:35,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-01-25 03:50:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:35,132 INFO L225 Difference]: With dead ends: 212 [2018-01-25 03:50:35,132 INFO L226 Difference]: Without dead ends: 211 [2018-01-25 03:50:35,132 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 [2018-01-25 03:50:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-01-25 03:50:35,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 146. [2018-01-25 03:50:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-01-25 03:50:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 169 transitions. [2018-01-25 03:50:35,141 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 169 transitions. Word has length 22 [2018-01-25 03:50:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:35,141 INFO L432 AbstractCegarLoop]: Abstraction has 146 states and 169 transitions. [2018-01-25 03:50:35,141 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 03:50:35,142 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 169 transitions. [2018-01-25 03:50:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-25 03:50:35,142 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:35,143 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] [2018-01-25 03:50:35,143 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]=== [2018-01-25 03:50:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1348114366, now seen corresponding path program 1 times [2018-01-25 03:50:35,143 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:35,144 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:35,144 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:35,144 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:35,144 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:35,159 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:35,234 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:35,234 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 03:50:35,234 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:35,234 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 03:50:35,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 03:50:35,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 03:50:35,235 INFO L87 Difference]: Start difference. First operand 146 states and 169 transitions. Second operand 6 states. [2018-01-25 03:50:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:36,007 INFO L93 Difference]: Finished difference Result 232 states and 272 transitions. [2018-01-25 03:50:36,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 03:50:36,007 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-01-25 03:50:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:36,008 INFO L225 Difference]: With dead ends: 232 [2018-01-25 03:50:36,009 INFO L226 Difference]: Without dead ends: 222 [2018-01-25 03:50:36,009 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 [2018-01-25 03:50:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-01-25 03:50:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 130. [2018-01-25 03:50:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-01-25 03:50:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2018-01-25 03:50:36,018 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 22 [2018-01-25 03:50:36,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:36,018 INFO L432 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2018-01-25 03:50:36,018 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 03:50:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2018-01-25 03:50:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 03:50:36,019 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:36,019 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] [2018-01-25 03:50:36,019 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]=== [2018-01-25 03:50:36,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1821397366, now seen corresponding path program 1 times [2018-01-25 03:50:36,019 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:36,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:36,020 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:36,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:36,020 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:36,030 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:36,066 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:36,066 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 03:50:36,066 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:36,067 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:50:36,067 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:50:36,067 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:36,067 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand 5 states. [2018-01-25 03:50:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:36,301 INFO L93 Difference]: Finished difference Result 183 states and 209 transitions. [2018-01-25 03:50:36,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:50:36,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-25 03:50:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:36,303 INFO L225 Difference]: With dead ends: 183 [2018-01-25 03:50:36,303 INFO L226 Difference]: Without dead ends: 148 [2018-01-25 03:50:36,304 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:50:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-01-25 03:50:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 130. [2018-01-25 03:50:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-01-25 03:50:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 150 transitions. [2018-01-25 03:50:36,314 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 150 transitions. Word has length 25 [2018-01-25 03:50:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:36,314 INFO L432 AbstractCegarLoop]: Abstraction has 130 states and 150 transitions. [2018-01-25 03:50:36,314 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:50:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 150 transitions. [2018-01-25 03:50:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-25 03:50:36,316 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:36,316 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] [2018-01-25 03:50:36,316 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]=== [2018-01-25 03:50:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash 203248485, now seen corresponding path program 1 times [2018-01-25 03:50:36,316 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:36,317 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:36,317 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:36,317 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:36,317 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:36,330 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:36,497 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:36,498 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:50:36,498 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:36,498 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 03:50:36,498 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 03:50:36,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 03:50:36,499 INFO L87 Difference]: Start difference. First operand 130 states and 150 transitions. Second operand 4 states. [2018-01-25 03:50:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:36,816 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2018-01-25 03:50:36,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:50:36,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-01-25 03:50:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:36,817 INFO L225 Difference]: With dead ends: 230 [2018-01-25 03:50:36,818 INFO L226 Difference]: Without dead ends: 156 [2018-01-25 03:50:36,818 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-25 03:50:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2018-01-25 03:50:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-01-25 03:50:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2018-01-25 03:50:36,827 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 28 [2018-01-25 03:50:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:36,827 INFO L432 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2018-01-25 03:50:36,827 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 03:50:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2018-01-25 03:50:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-25 03:50:36,829 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:36,829 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] [2018-01-25 03:50:36,829 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]=== [2018-01-25 03:50:36,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1370430932, now seen corresponding path program 1 times [2018-01-25 03:50:36,830 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:36,831 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:36,831 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:36,831 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:36,831 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:36,848 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:36,911 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:36,911 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:50:36,911 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:36,912 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:50:36,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:50:36,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:36,912 INFO L87 Difference]: Start difference. First operand 134 states and 154 transitions. Second operand 5 states. [2018-01-25 03:50:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:37,299 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2018-01-25 03:50:37,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 03:50:37,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-25 03:50:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:37,301 INFO L225 Difference]: With dead ends: 233 [2018-01-25 03:50:37,301 INFO L226 Difference]: Without dead ends: 232 [2018-01-25 03:50:37,302 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-25 03:50:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-01-25 03:50:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 133. [2018-01-25 03:50:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-25 03:50:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2018-01-25 03:50:37,314 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 29 [2018-01-25 03:50:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:37,315 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2018-01-25 03:50:37,315 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:50:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2018-01-25 03:50:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-25 03:50:37,318 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:37,318 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] [2018-01-25 03:50:37,319 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]=== [2018-01-25 03:50:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1370430931, now seen corresponding path program 1 times [2018-01-25 03:50:37,319 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:37,320 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:37,320 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:37,320 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:37,320 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:37,339 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:37,412 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:37,412 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:50:37,412 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:37,412 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:50:37,412 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:50:37,412 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:37,413 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand 5 states. [2018-01-25 03:50:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:37,882 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2018-01-25 03:50:37,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 03:50:37,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-25 03:50:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:37,884 INFO L225 Difference]: With dead ends: 239 [2018-01-25 03:50:37,884 INFO L226 Difference]: Without dead ends: 238 [2018-01-25 03:50:37,884 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 [2018-01-25 03:50:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-01-25 03:50:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 132. [2018-01-25 03:50:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-01-25 03:50:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2018-01-25 03:50:37,896 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 29 [2018-01-25 03:50:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:37,897 INFO L432 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2018-01-25 03:50:37,897 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:50:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2018-01-25 03:50:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-25 03:50:37,898 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:37,898 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:50:37,899 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]=== [2018-01-25 03:50:37,899 INFO L82 PathProgramCache]: Analyzing trace with hash 811222786, now seen corresponding path program 1 times [2018-01-25 03:50:37,899 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:37,900 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:37,900 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:37,900 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:37,900 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:37,914 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:38,164 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:38,165 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-25 03:50:38,165 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:38,165 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-25 03:50:38,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-25 03:50:38,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-01-25 03:50:38,165 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand 10 states. [2018-01-25 03:50:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:38,546 INFO L93 Difference]: Finished difference Result 240 states and 274 transitions. [2018-01-25 03:50:38,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-25 03:50:38,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-01-25 03:50:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:38,547 INFO L225 Difference]: With dead ends: 240 [2018-01-25 03:50:38,547 INFO L226 Difference]: Without dead ends: 239 [2018-01-25 03:50:38,548 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-01-25 03:50:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-01-25 03:50:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 149. [2018-01-25 03:50:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-01-25 03:50:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 173 transitions. [2018-01-25 03:50:38,563 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 173 transitions. Word has length 30 [2018-01-25 03:50:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:38,563 INFO L432 AbstractCegarLoop]: Abstraction has 149 states and 173 transitions. [2018-01-25 03:50:38,563 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-25 03:50:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 173 transitions. [2018-01-25 03:50:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-25 03:50:38,565 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:38,565 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:50:38,565 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]=== [2018-01-25 03:50:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 811222787, now seen corresponding path program 1 times [2018-01-25 03:50:38,565 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:38,566 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:38,566 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:38,566 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:38,567 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:38,579 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:38,770 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:38,770 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-25 03:50:38,770 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:38,771 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-25 03:50:38,771 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-25 03:50:38,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-01-25 03:50:38,771 INFO L87 Difference]: Start difference. First operand 149 states and 173 transitions. Second operand 9 states. [2018-01-25 03:50:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:39,314 INFO L93 Difference]: Finished difference Result 294 states and 336 transitions. [2018-01-25 03:50:39,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-25 03:50:39,315 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-01-25 03:50:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:39,316 INFO L225 Difference]: With dead ends: 294 [2018-01-25 03:50:39,316 INFO L226 Difference]: Without dead ends: 218 [2018-01-25 03:50:39,317 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 [2018-01-25 03:50:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-01-25 03:50:39,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 145. [2018-01-25 03:50:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-01-25 03:50:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2018-01-25 03:50:39,331 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 30 [2018-01-25 03:50:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:39,331 INFO L432 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2018-01-25 03:50:39,331 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-25 03:50:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2018-01-25 03:50:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-25 03:50:39,332 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:39,332 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] [2018-01-25 03:50:39,332 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]=== [2018-01-25 03:50:39,333 INFO L82 PathProgramCache]: Analyzing trace with hash -518752177, now seen corresponding path program 1 times [2018-01-25 03:50:39,333 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:39,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:39,333 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:39,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:39,333 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:39,350 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:39,479 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:39,479 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-25 03:50:39,480 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:39,480 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-25 03:50:39,480 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-25 03:50:39,480 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-25 03:50:39,480 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand 9 states. [2018-01-25 03:50:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:40,176 INFO L93 Difference]: Finished difference Result 399 states and 455 transitions. [2018-01-25 03:50:40,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-25 03:50:40,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-01-25 03:50:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:40,179 INFO L225 Difference]: With dead ends: 399 [2018-01-25 03:50:40,179 INFO L226 Difference]: Without dead ends: 398 [2018-01-25 03:50:40,183 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 [2018-01-25 03:50:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-01-25 03:50:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 161. [2018-01-25 03:50:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-01-25 03:50:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 187 transitions. [2018-01-25 03:50:40,200 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 187 transitions. Word has length 33 [2018-01-25 03:50:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:40,201 INFO L432 AbstractCegarLoop]: Abstraction has 161 states and 187 transitions. [2018-01-25 03:50:40,201 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-25 03:50:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 187 transitions. [2018-01-25 03:50:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-25 03:50:40,203 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:40,203 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] [2018-01-25 03:50:40,203 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]=== [2018-01-25 03:50:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash -518752176, now seen corresponding path program 1 times [2018-01-25 03:50:40,203 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:40,204 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:40,204 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:40,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:40,205 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:40,266 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:40,494 WARN L146 SmtUtils]: Spent 131ms on a formula simplification. DAG size of input: 29 DAG size of output 25 [2018-01-25 03:50:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:40,543 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:40,543 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-25 03:50:40,543 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:40,544 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-25 03:50:40,544 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-25 03:50:40,544 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-25 03:50:40,544 INFO L87 Difference]: Start difference. First operand 161 states and 187 transitions. Second operand 9 states. [2018-01-25 03:50:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:41,286 INFO L93 Difference]: Finished difference Result 312 states and 355 transitions. [2018-01-25 03:50:41,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-25 03:50:41,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-01-25 03:50:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:41,287 INFO L225 Difference]: With dead ends: 312 [2018-01-25 03:50:41,287 INFO L226 Difference]: Without dead ends: 311 [2018-01-25 03:50:41,288 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-01-25 03:50:41,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-01-25 03:50:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 161. [2018-01-25 03:50:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-01-25 03:50:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2018-01-25 03:50:41,305 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 33 [2018-01-25 03:50:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:41,305 INFO L432 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2018-01-25 03:50:41,306 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-25 03:50:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2018-01-25 03:50:41,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-25 03:50:41,306 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:41,307 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] [2018-01-25 03:50:41,307 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]=== [2018-01-25 03:50:41,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1613392636, now seen corresponding path program 1 times [2018-01-25 03:50:41,307 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:41,308 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:41,308 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:41,308 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:41,308 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:41,317 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:41,346 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:50:41,346 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:50:41,346 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:50:41,346 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 03:50:41,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 03:50:41,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 03:50:41,347 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand 4 states. [2018-01-25 03:50:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:50:41,384 INFO L93 Difference]: Finished difference Result 241 states and 278 transitions. [2018-01-25 03:50:41,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:50:41,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-01-25 03:50:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:50:41,386 INFO L225 Difference]: With dead ends: 241 [2018-01-25 03:50:41,386 INFO L226 Difference]: Without dead ends: 172 [2018-01-25 03:50:41,387 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:50:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-01-25 03:50:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2018-01-25 03:50:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-01-25 03:50:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2018-01-25 03:50:41,402 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 36 [2018-01-25 03:50:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:50:41,402 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2018-01-25 03:50:41,402 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 03:50:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2018-01-25 03:50:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-25 03:50:41,403 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:50:41,403 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] [2018-01-25 03:50:41,403 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]=== [2018-01-25 03:50:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1298991553, now seen corresponding path program 1 times [2018-01-25 03:50:41,404 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:50:41,404 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:41,405 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:50:41,405 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:50:41,405 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:50:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:50:41,417 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:50:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:50:41,674 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 03:50:41,674 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 03:50:41,675 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-01-25 03:50:41,677 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] [2018-01-25 03:50:41,724 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 03:50:41,725 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