java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/memsafety/test-0504_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:15:16,012 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:15:16,013 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:15:16,029 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:15:16,029 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:15:16,030 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:15:16,031 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:15:16,033 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:15:16,035 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:15:16,036 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:15:16,037 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:15:16,037 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:15:16,038 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:15:16,038 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:15:16,039 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:15:16,041 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:15:16,043 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:15:16,045 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:15:16,047 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:15:16,048 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:15:16,050 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:15:16,050 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:15:16,051 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:15:16,051 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:15:16,052 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:15:16,053 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:15:16,053 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:15:16,054 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:15:16,054 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:15:16,054 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:15:16,055 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:15:16,055 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 20:15:16,065 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:15:16,066 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:15:16,066 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:15:16,067 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:15:16,067 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:15:16,067 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:15:16,067 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:15:16,067 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:15:16,068 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:15:16,068 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:15:16,068 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:15:16,069 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:15:16,069 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:15:16,069 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:15:16,069 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:15:16,069 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:15:16,070 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:15:16,070 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:15:16,070 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:15:16,070 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:15:16,071 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:15:16,071 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:15:16,071 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:15:16,071 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:15:16,071 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:15:16,072 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:15:16,072 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:15:16,072 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:15:16,072 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:15:16,073 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:15:16,073 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:15:16,073 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:15:16,073 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:15:16,073 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:15:16,074 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:15:16,074 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:15:16,075 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:15:16,110 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:15:16,122 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:15:16,126 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:15:16,128 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:15:16,128 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:15:16,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0504_true-valid-memsafety.i [2018-01-24 20:15:16,285 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:15:16,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:15:16,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:15:16,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:15:16,296 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:15:16,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:15:16" (1/1) ... [2018-01-24 20:15:16,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eaa2765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16, skipping insertion in model container [2018-01-24 20:15:16,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:15:16" (1/1) ... [2018-01-24 20:15:16,313 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:15:16,352 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:15:16,476 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:15:16,498 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:15:16,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16 WrapperNode [2018-01-24 20:15:16,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:15:16,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:15:16,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:15:16,509 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:15:16,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16" (1/1) ... [2018-01-24 20:15:16,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16" (1/1) ... [2018-01-24 20:15:16,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16" (1/1) ... [2018-01-24 20:15:16,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16" (1/1) ... [2018-01-24 20:15:16,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16" (1/1) ... [2018-01-24 20:15:16,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16" (1/1) ... [2018-01-24 20:15:16,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16" (1/1) ... [2018-01-24 20:15:16,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:15:16,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:15:16,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:15:16,549 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:15:16,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:15:16,595 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:15:16,595 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:15:16,595 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:15:16,596 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-24 20:15:16,597 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:15:16,597 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:15:16,597 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:15:16,597 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:15:16,995 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:15:16,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:15:16 BoogieIcfgContainer [2018-01-24 20:15:16,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:15:16,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:15:16,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:15:16,998 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:15:16,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:15:16" (1/3) ... [2018-01-24 20:15:17,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6037b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:15:16, skipping insertion in model container [2018-01-24 20:15:17,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:15:16" (2/3) ... [2018-01-24 20:15:17,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6037b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:15:17, skipping insertion in model container [2018-01-24 20:15:17,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:15:16" (3/3) ... [2018-01-24 20:15:17,002 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0504_true-valid-memsafety.i [2018-01-24 20:15:17,008 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:15:17,015 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 39 error locations. [2018-01-24 20:15:17,052 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:15:17,052 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:15:17,052 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:15:17,052 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:15:17,053 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:15:17,053 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:15:17,053 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:15:17,053 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:15:17,053 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:15:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2018-01-24 20:15:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-24 20:15:17,077 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:17,078 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:17,078 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:17,082 INFO L82 PathProgramCache]: Analyzing trace with hash 23857872, now seen corresponding path program 1 times [2018-01-24 20:15:17,084 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:17,124 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,124 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:17,124 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,125 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:17,166 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:17,194 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:17,195 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:15:17,195 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:17,197 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 20:15:17,207 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 20:15:17,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 20:15:17,209 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 2 states. [2018-01-24 20:15:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:17,313 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2018-01-24 20:15:17,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 20:15:17,315 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-01-24 20:15:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:17,325 INFO L225 Difference]: With dead ends: 182 [2018-01-24 20:15:17,325 INFO L226 Difference]: Without dead ends: 91 [2018-01-24 20:15:17,330 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 20:15:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-24 20:15:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-01-24 20:15:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-24 20:15:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2018-01-24 20:15:17,367 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 10 [2018-01-24 20:15:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:17,367 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2018-01-24 20:15:17,367 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 20:15:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2018-01-24 20:15:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 20:15:17,368 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:17,368 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:17,368 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1271008375, now seen corresponding path program 1 times [2018-01-24 20:15:17,369 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:17,370 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,370 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:17,370 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,370 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:17,383 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:17,423 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:17,423 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:15:17,423 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:17,425 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:15:17,425 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:15:17,425 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:15:17,425 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 3 states. [2018-01-24 20:15:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:17,468 INFO L93 Difference]: Finished difference Result 231 states and 243 transitions. [2018-01-24 20:15:17,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:15:17,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-01-24 20:15:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:17,471 INFO L225 Difference]: With dead ends: 231 [2018-01-24 20:15:17,472 INFO L226 Difference]: Without dead ends: 146 [2018-01-24 20:15:17,473 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:15:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-24 20:15:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 122. [2018-01-24 20:15:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-24 20:15:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 152 transitions. [2018-01-24 20:15:17,487 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 152 transitions. Word has length 12 [2018-01-24 20:15:17,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:17,488 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 152 transitions. [2018-01-24 20:15:17,488 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:15:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 152 transitions. [2018-01-24 20:15:17,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 20:15:17,488 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:17,489 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:17,489 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:17,489 INFO L82 PathProgramCache]: Analyzing trace with hash -746554717, now seen corresponding path program 1 times [2018-01-24 20:15:17,489 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:17,490 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,491 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:17,491 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,491 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:17,501 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:17,524 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:17,524 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:15:17,524 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:17,524 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:15:17,525 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:15:17,525 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:15:17,525 INFO L87 Difference]: Start difference. First operand 122 states and 152 transitions. Second operand 3 states. [2018-01-24 20:15:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:17,641 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2018-01-24 20:15:17,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:15:17,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-01-24 20:15:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:17,643 INFO L225 Difference]: With dead ends: 125 [2018-01-24 20:15:17,643 INFO L226 Difference]: Without dead ends: 120 [2018-01-24 20:15:17,644 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:15:17,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-01-24 20:15:17,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-01-24 20:15:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-24 20:15:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 149 transitions. [2018-01-24 20:15:17,655 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 149 transitions. Word has length 13 [2018-01-24 20:15:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:17,656 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 149 transitions. [2018-01-24 20:15:17,656 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:15:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 149 transitions. [2018-01-24 20:15:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 20:15:17,657 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:17,657 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:17,657 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash -747420669, now seen corresponding path program 1 times [2018-01-24 20:15:17,657 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:17,658 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,658 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:17,658 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,659 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:17,672 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:17,729 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:17,729 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:15:17,730 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:17,730 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:15:17,730 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:15:17,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:15:17,731 INFO L87 Difference]: Start difference. First operand 120 states and 149 transitions. Second operand 4 states. [2018-01-24 20:15:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:17,876 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2018-01-24 20:15:17,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:15:17,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 20:15:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:17,879 INFO L225 Difference]: With dead ends: 145 [2018-01-24 20:15:17,879 INFO L226 Difference]: Without dead ends: 137 [2018-01-24 20:15:17,880 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 20:15:17,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-01-24 20:15:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2018-01-24 20:15:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-24 20:15:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2018-01-24 20:15:17,890 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 13 [2018-01-24 20:15:17,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:17,890 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2018-01-24 20:15:17,890 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:15:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2018-01-24 20:15:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 20:15:17,891 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:17,891 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:17,891 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:17,892 INFO L82 PathProgramCache]: Analyzing trace with hash -747420668, now seen corresponding path program 1 times [2018-01-24 20:15:17,892 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:17,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,893 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:17,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:17,893 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:17,904 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:17,965 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:17,965 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:15:17,965 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:17,966 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:15:17,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:15:17,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:15:17,966 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand 4 states. [2018-01-24 20:15:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:18,099 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2018-01-24 20:15:18,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:15:18,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 20:15:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:18,101 INFO L225 Difference]: With dead ends: 158 [2018-01-24 20:15:18,101 INFO L226 Difference]: Without dead ends: 152 [2018-01-24 20:15:18,102 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:15:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-01-24 20:15:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2018-01-24 20:15:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-01-24 20:15:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2018-01-24 20:15:18,113 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 13 [2018-01-24 20:15:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:18,114 INFO L432 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2018-01-24 20:15:18,114 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:15:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2018-01-24 20:15:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 20:15:18,115 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:18,115 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:18,115 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2050240790, now seen corresponding path program 1 times [2018-01-24 20:15:18,115 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:18,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:18,117 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:18,117 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:18,117 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:18,145 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:18,268 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:18,268 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:15:18,268 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:18,269 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:15:18,269 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:15:18,269 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:15:18,269 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand 5 states. [2018-01-24 20:15:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:18,416 INFO L93 Difference]: Finished difference Result 201 states and 225 transitions. [2018-01-24 20:15:18,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:15:18,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-24 20:15:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:18,418 INFO L225 Difference]: With dead ends: 201 [2018-01-24 20:15:18,418 INFO L226 Difference]: Without dead ends: 198 [2018-01-24 20:15:18,418 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:15:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-01-24 20:15:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 104. [2018-01-24 20:15:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-24 20:15:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2018-01-24 20:15:18,428 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 25 [2018-01-24 20:15:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:18,429 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2018-01-24 20:15:18,429 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:15:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2018-01-24 20:15:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:15:18,430 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:18,430 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] [2018-01-24 20:15:18,430 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:18,431 INFO L82 PathProgramCache]: Analyzing trace with hash -867044953, now seen corresponding path program 1 times [2018-01-24 20:15:18,431 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:18,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:18,432 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:18,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:18,433 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:18,451 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:18,530 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:18,531 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:15:18,531 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:18,531 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:15:18,531 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:15:18,532 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:15:18,532 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 4 states. [2018-01-24 20:15:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:18,669 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2018-01-24 20:15:18,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:15:18,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2018-01-24 20:15:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:18,670 INFO L225 Difference]: With dead ends: 156 [2018-01-24 20:15:18,670 INFO L226 Difference]: Without dead ends: 152 [2018-01-24 20:15:18,671 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:15:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-01-24 20:15:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 100. [2018-01-24 20:15:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-24 20:15:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2018-01-24 20:15:18,678 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 26 [2018-01-24 20:15:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:18,679 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2018-01-24 20:15:18,679 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:15:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2018-01-24 20:15:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:15:18,680 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:18,680 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] [2018-01-24 20:15:18,680 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash -867044952, now seen corresponding path program 1 times [2018-01-24 20:15:18,680 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:18,681 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:18,681 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:18,682 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:18,682 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:18,698 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:18,761 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:18,761 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:15:18,761 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:18,761 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:15:18,762 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:15:18,762 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:15:18,762 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand 4 states. [2018-01-24 20:15:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:18,850 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2018-01-24 20:15:18,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:15:18,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2018-01-24 20:15:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:18,852 INFO L225 Difference]: With dead ends: 144 [2018-01-24 20:15:18,852 INFO L226 Difference]: Without dead ends: 140 [2018-01-24 20:15:18,853 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:15:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-01-24 20:15:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-01-24 20:15:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-24 20:15:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2018-01-24 20:15:18,858 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 26 [2018-01-24 20:15:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:18,859 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2018-01-24 20:15:18,859 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:15:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2018-01-24 20:15:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 20:15:18,859 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:18,860 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:18,860 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:18,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2023715676, now seen corresponding path program 1 times [2018-01-24 20:15:18,860 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:18,860 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:18,861 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:18,861 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:18,861 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:18,875 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:18,971 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:18,971 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:15:18,971 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:18,972 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:15:18,972 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:15:18,972 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:15:18,972 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 4 states. [2018-01-24 20:15:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:19,090 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2018-01-24 20:15:19,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:15:19,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-01-24 20:15:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:19,092 INFO L225 Difference]: With dead ends: 123 [2018-01-24 20:15:19,092 INFO L226 Difference]: Without dead ends: 122 [2018-01-24 20:15:19,092 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:15:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-01-24 20:15:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2018-01-24 20:15:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-01-24 20:15:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2018-01-24 20:15:19,098 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 28 [2018-01-24 20:15:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:19,099 INFO L432 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2018-01-24 20:15:19,099 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:15:19,099 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2018-01-24 20:15:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 20:15:19,099 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:19,099 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:19,099 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:19,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2023715675, now seen corresponding path program 1 times [2018-01-24 20:15:19,100 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:19,100 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:19,100 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:19,101 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:19,101 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:19,113 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:19,239 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:19,239 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:15:19,239 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:19,240 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:15:19,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:15:19,240 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:15:19,240 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand 5 states. [2018-01-24 20:15:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:19,365 INFO L93 Difference]: Finished difference Result 177 states and 196 transitions. [2018-01-24 20:15:19,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:15:19,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-24 20:15:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:19,368 INFO L225 Difference]: With dead ends: 177 [2018-01-24 20:15:19,368 INFO L226 Difference]: Without dead ends: 176 [2018-01-24 20:15:19,368 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:15:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-01-24 20:15:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 129. [2018-01-24 20:15:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-01-24 20:15:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2018-01-24 20:15:19,380 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 28 [2018-01-24 20:15:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:19,381 INFO L432 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2018-01-24 20:15:19,381 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:15:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2018-01-24 20:15:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 20:15:19,382 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:19,382 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:19,382 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1689322728, now seen corresponding path program 1 times [2018-01-24 20:15:19,383 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:19,384 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:19,384 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:19,384 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:19,384 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:19,397 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:19,436 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:19,436 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:15:19,436 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:19,437 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:15:19,437 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:15:19,437 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:15:19,437 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand 5 states. [2018-01-24 20:15:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:19,522 INFO L93 Difference]: Finished difference Result 223 states and 252 transitions. [2018-01-24 20:15:19,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:15:19,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-24 20:15:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:19,524 INFO L225 Difference]: With dead ends: 223 [2018-01-24 20:15:19,524 INFO L226 Difference]: Without dead ends: 133 [2018-01-24 20:15:19,525 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:15:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-01-24 20:15:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2018-01-24 20:15:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-01-24 20:15:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2018-01-24 20:15:19,536 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 29 [2018-01-24 20:15:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:19,537 INFO L432 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2018-01-24 20:15:19,537 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:15:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2018-01-24 20:15:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 20:15:19,538 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:19,538 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 20:15:19,538 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:19,539 INFO L82 PathProgramCache]: Analyzing trace with hash -202845861, now seen corresponding path program 1 times [2018-01-24 20:15:19,539 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:19,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:19,540 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:19,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:19,540 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:19,564 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:19,646 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:19,646 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:15:19,646 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:19,646 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:15:19,647 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:15:19,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:15:19,647 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 6 states. [2018-01-24 20:15:19,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:19,834 INFO L93 Difference]: Finished difference Result 195 states and 213 transitions. [2018-01-24 20:15:19,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 20:15:19,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-01-24 20:15:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:19,836 INFO L225 Difference]: With dead ends: 195 [2018-01-24 20:15:19,836 INFO L226 Difference]: Without dead ends: 194 [2018-01-24 20:15:19,837 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:15:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-01-24 20:15:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2018-01-24 20:15:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-01-24 20:15:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2018-01-24 20:15:19,849 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 29 [2018-01-24 20:15:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:19,849 INFO L432 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2018-01-24 20:15:19,849 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:15:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2018-01-24 20:15:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 20:15:19,850 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:19,850 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 20:15:19,850 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:19,850 INFO L82 PathProgramCache]: Analyzing trace with hash -202845860, now seen corresponding path program 1 times [2018-01-24 20:15:19,850 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:19,851 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:19,851 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:19,851 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:19,851 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:19,866 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:20,104 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:20,104 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 20:15:20,104 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:20,104 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 20:15:20,105 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 20:15:20,105 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:15:20,105 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand 10 states. [2018-01-24 20:15:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:20,514 INFO L93 Difference]: Finished difference Result 222 states and 239 transitions. [2018-01-24 20:15:20,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 20:15:20,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-01-24 20:15:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:20,515 INFO L225 Difference]: With dead ends: 222 [2018-01-24 20:15:20,516 INFO L226 Difference]: Without dead ends: 221 [2018-01-24 20:15:20,516 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2018-01-24 20:15:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-01-24 20:15:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 144. [2018-01-24 20:15:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-01-24 20:15:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 157 transitions. [2018-01-24 20:15:20,526 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 157 transitions. Word has length 29 [2018-01-24 20:15:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:20,526 INFO L432 AbstractCegarLoop]: Abstraction has 144 states and 157 transitions. [2018-01-24 20:15:20,527 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 20:15:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 157 transitions. [2018-01-24 20:15:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:15:20,528 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:20,528 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] [2018-01-24 20:15:20,528 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:20,528 INFO L82 PathProgramCache]: Analyzing trace with hash 829423013, now seen corresponding path program 1 times [2018-01-24 20:15:20,528 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:20,529 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:20,529 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:20,529 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:20,529 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:20,543 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 20:15:20,573 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:20,573 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:15:20,573 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:20,574 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:15:20,574 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:15:20,574 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:15:20,575 INFO L87 Difference]: Start difference. First operand 144 states and 157 transitions. Second operand 4 states. [2018-01-24 20:15:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:20,678 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2018-01-24 20:15:20,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:15:20,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-01-24 20:15:20,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:20,680 INFO L225 Difference]: With dead ends: 156 [2018-01-24 20:15:20,680 INFO L226 Difference]: Without dead ends: 154 [2018-01-24 20:15:20,680 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:15:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-01-24 20:15:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2018-01-24 20:15:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-01-24 20:15:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2018-01-24 20:15:20,693 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 30 [2018-01-24 20:15:20,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:20,693 INFO L432 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2018-01-24 20:15:20,693 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:15:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2018-01-24 20:15:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:15:20,695 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:20,695 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] [2018-01-24 20:15:20,695 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:20,695 INFO L82 PathProgramCache]: Analyzing trace with hash 829423014, now seen corresponding path program 1 times [2018-01-24 20:15:20,696 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:20,696 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:20,697 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:20,697 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:20,697 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:20,714 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:20,782 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:20,782 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:15:20,782 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:20,782 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:15:20,782 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:15:20,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:15:20,783 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand 6 states. [2018-01-24 20:15:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:20,992 INFO L93 Difference]: Finished difference Result 214 states and 235 transitions. [2018-01-24 20:15:20,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:15:20,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2018-01-24 20:15:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:20,994 INFO L225 Difference]: With dead ends: 214 [2018-01-24 20:15:20,994 INFO L226 Difference]: Without dead ends: 212 [2018-01-24 20:15:20,995 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:15:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-01-24 20:15:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 158. [2018-01-24 20:15:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-24 20:15:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2018-01-24 20:15:21,009 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 30 [2018-01-24 20:15:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:21,009 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2018-01-24 20:15:21,009 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:15:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2018-01-24 20:15:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-24 20:15:21,010 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:21,010 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:21,010 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:21,010 INFO L82 PathProgramCache]: Analyzing trace with hash -664393622, now seen corresponding path program 1 times [2018-01-24 20:15:21,011 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:21,011 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:21,012 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:21,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:21,012 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:21,024 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:21,129 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:15:21,129 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:15:21,129 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:15:21,129 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:15:21,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:15:21,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:15:21,130 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand 7 states. [2018-01-24 20:15:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:15:21,411 INFO L93 Difference]: Finished difference Result 253 states and 291 transitions. [2018-01-24 20:15:21,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 20:15:21,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2018-01-24 20:15:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:15:21,413 INFO L225 Difference]: With dead ends: 253 [2018-01-24 20:15:21,413 INFO L226 Difference]: Without dead ends: 220 [2018-01-24 20:15:21,414 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:15:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-01-24 20:15:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 169. [2018-01-24 20:15:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-01-24 20:15:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 192 transitions. [2018-01-24 20:15:21,429 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 192 transitions. Word has length 34 [2018-01-24 20:15:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:15:21,429 INFO L432 AbstractCegarLoop]: Abstraction has 169 states and 192 transitions. [2018-01-24 20:15:21,429 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:15:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 192 transitions. [2018-01-24 20:15:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-24 20:15:21,430 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:15:21,430 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:15:21,431 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr38EnsuresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation]=== [2018-01-24 20:15:21,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1742572463, now seen corresponding path program 1 times [2018-01-24 20:15:21,431 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:15:21,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:21,432 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:15:21,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:15:21,432 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:15:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:15:21,445 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:15:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:15:21,616 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:15:21,616 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:15:21,617 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-01-24 20:15:21,619 INFO L201 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [12], [13], [18], [20], [23], [26], [29], [32], [35], [39], [41], [44], [84], [100], [106], [107], [108], [110], [111], [114], [118], [122], [135], [144], [145], [149], [150], [151] [2018-01-24 20:15:21,668 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:15:21,669 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