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.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-buckets_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:13:04,207 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:13:04,209 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:13:04,221 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:13:04,222 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:13:04,222 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:13:04,223 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:13:04,225 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:13:04,227 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:13:04,228 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:13:04,229 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:13:04,230 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:13:04,231 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:13:04,233 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:13:04,234 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:13:04,242 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:13:04,244 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:13:04,246 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:13:04,248 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:13:04,249 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:13:04,252 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 16:13:04,252 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 16:13:04,253 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 16:13:04,254 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 16:13:04,255 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 16:13:04,256 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 16:13:04,256 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 16:13:04,257 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 16:13:04,257 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 16:13:04,257 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 16:13:04,258 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 16:13:04,258 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.epf [2018-01-24 16:13:04,268 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:13:04,269 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:13:04,270 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:13:04,270 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:13:04,270 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:13:04,270 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:13:04,271 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:13:04,271 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:13:04,271 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:13:04,272 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:13:04,272 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:13:04,272 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:13:04,272 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:13:04,272 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:13:04,273 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:13:04,273 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:13:04,273 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:13:04,273 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:13:04,273 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:13:04,274 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:13:04,274 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:13:04,274 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:13:04,274 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:13:04,274 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:13:04,275 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:13:04,275 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:13:04,275 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:13:04,275 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:13:04,275 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 16:13:04,276 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:13:04,276 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:13:04,276 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:13:04,276 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 16:13:04,277 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:13:04,277 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:13:04,313 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:13:04,327 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:13:04,332 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:13:04,333 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:13:04,334 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:13:04,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-buckets_true-unreach-call_true-valid-memsafety.i [2018-01-24 16:13:04,540 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:13:04,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:13:04,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:13:04,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:13:04,554 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:13:04,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:13:04" (1/1) ... [2018-01-24 16:13:04,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d842d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04, skipping insertion in model container [2018-01-24 16:13:04,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:13:04" (1/1) ... [2018-01-24 16:13:04,577 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:13:04,623 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:13:04,739 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:13:04,759 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:13:04,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04 WrapperNode [2018-01-24 16:13:04,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:13:04,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:13:04,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:13:04,771 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:13:04,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04" (1/1) ... [2018-01-24 16:13:04,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04" (1/1) ... [2018-01-24 16:13:04,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04" (1/1) ... [2018-01-24 16:13:04,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04" (1/1) ... [2018-01-24 16:13:04,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04" (1/1) ... [2018-01-24 16:13:04,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04" (1/1) ... [2018-01-24 16:13:04,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04" (1/1) ... [2018-01-24 16:13:04,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:13:04,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:13:04,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:13:04,810 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:13:04,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:13:04,857 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:13:04,857 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:13:04,857 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:13:04,857 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 16:13:04,858 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 16:13:04,858 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 16:13:04,858 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 16:13:04,858 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:13:04,858 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:13:04,858 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 16:13:04,858 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 16:13:04,858 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 16:13:04,858 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:13:04,859 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 16:13:04,859 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:13:04,859 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:13:04,859 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:13:05,416 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:13:05,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:13:05 BoogieIcfgContainer [2018-01-24 16:13:05,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:13:05,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 16:13:05,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 16:13:05,420 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 16:13:05,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 04:13:04" (1/3) ... [2018-01-24 16:13:05,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2113fc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:13:05, skipping insertion in model container [2018-01-24 16:13:05,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:13:04" (2/3) ... [2018-01-24 16:13:05,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2113fc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:13:05, skipping insertion in model container [2018-01-24 16:13:05,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:13:05" (3/3) ... [2018-01-24 16:13:05,424 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-buckets_true-unreach-call_true-valid-memsafety.i [2018-01-24 16:13:05,431 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 16:13:05,467 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 65 error locations. [2018-01-24 16:13:05,515 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 16:13:05,515 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 16:13:05,515 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 16:13:05,515 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 16:13:05,515 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 16:13:05,515 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 16:13:05,515 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 16:13:05,515 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 16:13:05,516 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 16:13:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states. [2018-01-24 16:13:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 16:13:05,544 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:05,545 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:05,545 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:05,549 INFO L82 PathProgramCache]: Analyzing trace with hash -102951268, now seen corresponding path program 1 times [2018-01-24 16:13:05,550 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:05,591 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:05,591 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:05,591 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:05,592 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:05,638 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:05,700 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:05,700 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:13:05,700 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:05,703 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:13:05,713 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:13:05,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:13:05,716 INFO L87 Difference]: Start difference. First operand 156 states. Second operand 4 states. [2018-01-24 16:13:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:06,099 INFO L93 Difference]: Finished difference Result 309 states and 373 transitions. [2018-01-24 16:13:06,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:13:06,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 16:13:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:06,115 INFO L225 Difference]: With dead ends: 309 [2018-01-24 16:13:06,115 INFO L226 Difference]: Without dead ends: 190 [2018-01-24 16:13:06,120 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:13:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-01-24 16:13:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2018-01-24 16:13:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-01-24 16:13:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 156 transitions. [2018-01-24 16:13:06,168 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 156 transitions. Word has length 8 [2018-01-24 16:13:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:06,169 INFO L432 AbstractCegarLoop]: Abstraction has 149 states and 156 transitions. [2018-01-24 16:13:06,169 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:13:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 156 transitions. [2018-01-24 16:13:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 16:13:06,170 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:06,170 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:06,170 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:06,171 INFO L82 PathProgramCache]: Analyzing trace with hash -102951267, now seen corresponding path program 1 times [2018-01-24 16:13:06,171 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:06,172 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:06,172 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:06,172 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:06,172 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:06,189 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:06,260 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:06,260 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:13:06,260 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:06,262 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:13:06,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:13:06,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:13:06,263 INFO L87 Difference]: Start difference. First operand 149 states and 156 transitions. Second operand 4 states. [2018-01-24 16:13:06,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:06,556 INFO L93 Difference]: Finished difference Result 230 states and 240 transitions. [2018-01-24 16:13:06,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:13:06,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 16:13:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:06,558 INFO L225 Difference]: With dead ends: 230 [2018-01-24 16:13:06,558 INFO L226 Difference]: Without dead ends: 226 [2018-01-24 16:13:06,559 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:13:06,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-01-24 16:13:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 145. [2018-01-24 16:13:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-01-24 16:13:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 152 transitions. [2018-01-24 16:13:06,570 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 152 transitions. Word has length 8 [2018-01-24 16:13:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:06,570 INFO L432 AbstractCegarLoop]: Abstraction has 145 states and 152 transitions. [2018-01-24 16:13:06,570 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:13:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 152 transitions. [2018-01-24 16:13:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 16:13:06,570 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:06,571 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:06,571 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:06,571 INFO L82 PathProgramCache]: Analyzing trace with hash 966243267, now seen corresponding path program 1 times [2018-01-24 16:13:06,571 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:06,572 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:06,572 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:06,572 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:06,572 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:06,594 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:06,643 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:06,643 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:13:06,643 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:06,644 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:13:06,644 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:13:06,644 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:13:06,644 INFO L87 Difference]: Start difference. First operand 145 states and 152 transitions. Second operand 6 states. [2018-01-24 16:13:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:06,913 INFO L93 Difference]: Finished difference Result 203 states and 215 transitions. [2018-01-24 16:13:06,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 16:13:06,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-01-24 16:13:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:06,915 INFO L225 Difference]: With dead ends: 203 [2018-01-24 16:13:06,915 INFO L226 Difference]: Without dead ends: 190 [2018-01-24 16:13:06,916 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-01-24 16:13:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-01-24 16:13:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 146. [2018-01-24 16:13:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-01-24 16:13:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 160 transitions. [2018-01-24 16:13:06,930 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 160 transitions. Word has length 14 [2018-01-24 16:13:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:06,930 INFO L432 AbstractCegarLoop]: Abstraction has 146 states and 160 transitions. [2018-01-24 16:13:06,930 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:13:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 160 transitions. [2018-01-24 16:13:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 16:13:06,931 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:06,931 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:06,931 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:06,931 INFO L82 PathProgramCache]: Analyzing trace with hash 966243268, now seen corresponding path program 1 times [2018-01-24 16:13:06,932 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:06,933 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:06,933 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:06,933 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:06,933 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:06,953 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:07,023 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:07,023 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:13:07,024 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:07,024 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:13:07,024 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:13:07,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:13:07,024 INFO L87 Difference]: Start difference. First operand 146 states and 160 transitions. Second operand 6 states. [2018-01-24 16:13:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:07,299 INFO L93 Difference]: Finished difference Result 204 states and 227 transitions. [2018-01-24 16:13:07,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 16:13:07,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-01-24 16:13:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:07,301 INFO L225 Difference]: With dead ends: 204 [2018-01-24 16:13:07,301 INFO L226 Difference]: Without dead ends: 200 [2018-01-24 16:13:07,301 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-01-24 16:13:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-01-24 16:13:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2018-01-24 16:13:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-01-24 16:13:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2018-01-24 16:13:07,310 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 14 [2018-01-24 16:13:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:07,310 INFO L432 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2018-01-24 16:13:07,311 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:13:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2018-01-24 16:13:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 16:13:07,311 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:07,311 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:07,312 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1611969301, now seen corresponding path program 1 times [2018-01-24 16:13:07,312 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:07,313 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:07,313 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:07,313 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:07,313 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:07,335 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:07,443 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:07,443 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:13:07,443 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:07,443 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:13:07,444 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:13:07,444 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:13:07,444 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand 6 states. [2018-01-24 16:13:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:07,652 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2018-01-24 16:13:07,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 16:13:07,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-01-24 16:13:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:07,654 INFO L225 Difference]: With dead ends: 200 [2018-01-24 16:13:07,654 INFO L226 Difference]: Without dead ends: 197 [2018-01-24 16:13:07,654 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-01-24 16:13:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-01-24 16:13:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 139. [2018-01-24 16:13:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-01-24 16:13:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2018-01-24 16:13:07,664 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 20 [2018-01-24 16:13:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:07,664 INFO L432 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2018-01-24 16:13:07,664 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:13:07,664 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2018-01-24 16:13:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 16:13:07,665 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:07,665 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:07,665 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:07,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1611969302, now seen corresponding path program 1 times [2018-01-24 16:13:07,665 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:07,666 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:07,666 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:07,666 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:07,666 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:07,679 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:07,727 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:07,727 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:13:07,727 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:07,727 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:13:07,727 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:13:07,728 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:13:07,728 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand 6 states. [2018-01-24 16:13:07,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:07,883 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2018-01-24 16:13:07,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 16:13:07,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-01-24 16:13:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:07,885 INFO L225 Difference]: With dead ends: 183 [2018-01-24 16:13:07,885 INFO L226 Difference]: Without dead ends: 182 [2018-01-24 16:13:07,885 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 16:13:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-01-24 16:13:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 138. [2018-01-24 16:13:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-01-24 16:13:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2018-01-24 16:13:07,891 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 20 [2018-01-24 16:13:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:07,891 INFO L432 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2018-01-24 16:13:07,891 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:13:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2018-01-24 16:13:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 16:13:07,892 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:07,892 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:07,892 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:07,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1348719488, now seen corresponding path program 1 times [2018-01-24 16:13:07,893 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:07,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:07,893 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:07,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:07,893 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:07,915 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:07,966 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:07,966 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:13:07,966 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:07,966 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:13:07,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:13:07,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:13:07,967 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand 4 states. [2018-01-24 16:13:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:08,131 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2018-01-24 16:13:08,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:13:08,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-01-24 16:13:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:08,132 INFO L225 Difference]: With dead ends: 182 [2018-01-24 16:13:08,133 INFO L226 Difference]: Without dead ends: 177 [2018-01-24 16:13:08,133 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:13:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-01-24 16:13:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 133. [2018-01-24 16:13:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-24 16:13:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2018-01-24 16:13:08,142 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 29 [2018-01-24 16:13:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:08,143 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2018-01-24 16:13:08,143 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:13:08,143 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2018-01-24 16:13:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 16:13:08,144 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:08,144 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:08,144 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1348719489, now seen corresponding path program 1 times [2018-01-24 16:13:08,144 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:08,145 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:08,145 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:08,145 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:08,146 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:08,166 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:08,253 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:08,253 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:13:08,253 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:08,254 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:13:08,254 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:13:08,255 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:13:08,255 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand 4 states. [2018-01-24 16:13:08,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:08,493 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2018-01-24 16:13:08,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:13:08,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-01-24 16:13:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:08,495 INFO L225 Difference]: With dead ends: 201 [2018-01-24 16:13:08,495 INFO L226 Difference]: Without dead ends: 196 [2018-01-24 16:13:08,496 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:13:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-01-24 16:13:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 128. [2018-01-24 16:13:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-01-24 16:13:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2018-01-24 16:13:08,505 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 29 [2018-01-24 16:13:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:08,505 INFO L432 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2018-01-24 16:13:08,506 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:13:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2018-01-24 16:13:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 16:13:08,507 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:08,507 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:08,507 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:08,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1136810599, now seen corresponding path program 1 times [2018-01-24 16:13:08,507 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:08,508 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:08,508 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:08,508 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:08,509 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:08,553 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:08,884 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:08,884 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 16:13:08,884 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:08,885 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 16:13:08,885 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 16:13:08,885 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:13:08,885 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand 5 states. [2018-01-24 16:13:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:09,104 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2018-01-24 16:13:09,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 16:13:09,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-24 16:13:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:09,106 INFO L225 Difference]: With dead ends: 174 [2018-01-24 16:13:09,106 INFO L226 Difference]: Without dead ends: 171 [2018-01-24 16:13:09,106 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:13:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-01-24 16:13:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2018-01-24 16:13:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-01-24 16:13:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2018-01-24 16:13:09,113 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 30 [2018-01-24 16:13:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:09,113 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2018-01-24 16:13:09,113 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 16:13:09,113 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2018-01-24 16:13:09,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 16:13:09,114 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:09,114 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:09,115 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:09,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1136810598, now seen corresponding path program 1 times [2018-01-24 16:13:09,115 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:09,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:09,116 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:09,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:09,116 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:09,142 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:09,410 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:09,410 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 16:13:09,410 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:09,410 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 16:13:09,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 16:13:09,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-24 16:13:09,411 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand 8 states. [2018-01-24 16:13:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:10,083 INFO L93 Difference]: Finished difference Result 347 states and 391 transitions. [2018-01-24 16:13:10,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 16:13:10,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2018-01-24 16:13:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:10,085 INFO L225 Difference]: With dead ends: 347 [2018-01-24 16:13:10,085 INFO L226 Difference]: Without dead ends: 337 [2018-01-24 16:13:10,085 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2018-01-24 16:13:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-01-24 16:13:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 178. [2018-01-24 16:13:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-01-24 16:13:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 211 transitions. [2018-01-24 16:13:10,094 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 211 transitions. Word has length 30 [2018-01-24 16:13:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:10,095 INFO L432 AbstractCegarLoop]: Abstraction has 178 states and 211 transitions. [2018-01-24 16:13:10,095 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 16:13:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 211 transitions. [2018-01-24 16:13:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-24 16:13:10,096 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:10,096 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] [2018-01-24 16:13:10,097 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash -881389387, now seen corresponding path program 1 times [2018-01-24 16:13:10,097 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:10,098 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:10,098 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:10,098 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:10,098 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:10,113 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:10,163 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:10,163 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:13:10,163 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:10,164 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 16:13:10,164 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 16:13:10,164 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:13:10,164 INFO L87 Difference]: Start difference. First operand 178 states and 211 transitions. Second operand 5 states. [2018-01-24 16:13:10,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:10,305 INFO L93 Difference]: Finished difference Result 218 states and 246 transitions. [2018-01-24 16:13:10,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:13:10,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2018-01-24 16:13:10,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:10,306 INFO L225 Difference]: With dead ends: 218 [2018-01-24 16:13:10,306 INFO L226 Difference]: Without dead ends: 215 [2018-01-24 16:13:10,306 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:13:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-01-24 16:13:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 178. [2018-01-24 16:13:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-01-24 16:13:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 210 transitions. [2018-01-24 16:13:10,319 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 210 transitions. Word has length 31 [2018-01-24 16:13:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:10,320 INFO L432 AbstractCegarLoop]: Abstraction has 178 states and 210 transitions. [2018-01-24 16:13:10,320 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 16:13:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 210 transitions. [2018-01-24 16:13:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 16:13:10,321 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:10,321 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:10,321 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash 12023425, now seen corresponding path program 1 times [2018-01-24 16:13:10,322 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:10,323 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:10,323 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:10,323 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:10,323 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:10,348 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:10,900 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:13:10,901 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-01-24 16:13:10,901 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:13:10,901 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-24 16:13:10,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-24 16:13:10,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-01-24 16:13:10,902 INFO L87 Difference]: Start difference. First operand 178 states and 210 transitions. Second operand 16 states. [2018-01-24 16:13:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:13:12,273 INFO L93 Difference]: Finished difference Result 288 states and 343 transitions. [2018-01-24 16:13:12,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-24 16:13:12,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2018-01-24 16:13:12,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:13:12,276 INFO L225 Difference]: With dead ends: 288 [2018-01-24 16:13:12,276 INFO L226 Difference]: Without dead ends: 211 [2018-01-24 16:13:12,277 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2018-01-24 16:13:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-01-24 16:13:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 189. [2018-01-24 16:13:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-01-24 16:13:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 222 transitions. [2018-01-24 16:13:12,291 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 222 transitions. Word has length 35 [2018-01-24 16:13:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:13:12,292 INFO L432 AbstractCegarLoop]: Abstraction has 189 states and 222 transitions. [2018-01-24 16:13:12,292 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-24 16:13:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 222 transitions. [2018-01-24 16:13:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-24 16:13:12,293 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:13:12,294 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:13:12,294 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr64EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:13:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash -646683238, now seen corresponding path program 1 times [2018-01-24 16:13:12,294 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:13:12,295 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:12,295 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:13:12,295 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:13:12,296 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:13:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:13:12,319 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:13:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:13:12,911 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 16:13:12,911 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 16:13:12,912 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-01-24 16:13:12,913 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [9], [12], [15], [16], [19], [22], [23], [26], [29], [30], [33], [36], [39], [43], [45], [48], [194], [198], [204], [205], [206], [208], [209], [215], [219], [258], [263], [267], [273], [274], [277], [278], [281], [288], [289], [293], [294], [295] [2018-01-24 16:13:12,961 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 16:13:12,961 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