java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-01_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:58:15,005 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:58:15,007 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:58:15,022 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:58:15,022 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:58:15,023 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:58:15,024 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:58:15,026 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:58:15,028 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:58:15,029 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:58:15,030 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:58:15,030 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:58:15,031 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:58:15,032 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:58:15,033 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:58:15,036 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:58:15,038 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:58:15,040 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:58:15,041 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:58:15,042 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:58:15,045 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:58:15,045 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:58:15,045 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:58:15,046 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:58:15,047 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:58:15,049 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:58:15,049 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:58:15,050 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:58:15,050 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:58:15,050 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:58:15,051 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:58:15,051 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 20:58:15,059 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:58:15,060 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:58:15,060 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:58:15,060 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:58:15,061 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:58:15,061 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:58:15,061 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:58:15,061 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:58:15,061 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:58:15,062 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:58:15,062 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:58:15,062 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:58:15,062 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:58:15,062 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:58:15,063 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:58:15,063 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:58:15,063 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:58:15,063 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:58:15,063 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:58:15,063 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:58:15,063 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:58:15,064 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:58:15,064 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:58:15,064 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:58:15,064 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:58:15,064 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:58:15,065 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:58:15,065 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:58:15,065 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:58:15,065 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:58:15,065 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:58:15,065 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:58:15,065 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:58:15,065 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:58:15,066 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:58:15,066 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:58:15,066 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:58:15,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:58:15,111 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:58:15,114 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:58:15,115 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:58:15,116 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:58:15,116 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01_true-unreach-call_true-valid-memsafety.i [2018-01-24 20:58:15,279 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:58:15,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:58:15,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:58:15,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:58:15,291 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:58:15,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:58:15" (1/1) ... [2018-01-24 20:58:15,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ea857c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15, skipping insertion in model container [2018-01-24 20:58:15,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:58:15" (1/1) ... [2018-01-24 20:58:15,316 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:58:15,362 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:58:15,485 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:58:15,509 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:58:15,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15 WrapperNode [2018-01-24 20:58:15,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:58:15,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:58:15,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:58:15,521 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:58:15,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15" (1/1) ... [2018-01-24 20:58:15,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15" (1/1) ... [2018-01-24 20:58:15,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15" (1/1) ... [2018-01-24 20:58:15,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15" (1/1) ... [2018-01-24 20:58:15,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15" (1/1) ... [2018-01-24 20:58:15,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15" (1/1) ... [2018-01-24 20:58:15,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15" (1/1) ... [2018-01-24 20:58:15,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:58:15,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:58:15,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:58:15,561 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:58:15,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15" (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 20:58:15,606 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:58:15,606 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:58:15,606 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:58:15,606 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:58:15,606 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:58:15,606 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:58:15,607 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:58:15,607 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:58:15,607 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:58:15,607 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:58:15,607 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:58:15,607 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 20:58:15,608 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:58:15,608 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:58:15,608 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:58:16,261 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:58:16,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:58:16 BoogieIcfgContainer [2018-01-24 20:58:16,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:58:16,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:58:16,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:58:16,267 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:58:16,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:58:15" (1/3) ... [2018-01-24 20:58:16,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3ef7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:58:16, skipping insertion in model container [2018-01-24 20:58:16,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:15" (2/3) ... [2018-01-24 20:58:16,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3ef7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:58:16, skipping insertion in model container [2018-01-24 20:58:16,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:58:16" (3/3) ... [2018-01-24 20:58:16,271 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-01_true-unreach-call_true-valid-memsafety.i [2018-01-24 20:58:16,281 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:58:16,290 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 63 error locations. [2018-01-24 20:58:16,344 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:58:16,344 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:58:16,344 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:58:16,344 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:58:16,344 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:58:16,345 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:58:16,345 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:58:16,345 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:58:16,346 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:58:16,371 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states. [2018-01-24 20:58:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:58:16,378 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:16,379 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:16,379 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1781428784, now seen corresponding path program 1 times [2018-01-24 20:58:16,387 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:16,450 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:16,451 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:16,451 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:16,451 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:16,499 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:16,575 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 20:58:16,577 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:16,578 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:58:16,578 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:16,582 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:58:16,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:58:16,598 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:58:16,601 INFO L87 Difference]: Start difference. First operand 183 states. Second operand 4 states. [2018-01-24 20:58:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:16,942 INFO L93 Difference]: Finished difference Result 384 states and 511 transitions. [2018-01-24 20:58:16,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:58:16,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:58:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:16,958 INFO L225 Difference]: With dead ends: 384 [2018-01-24 20:58:16,958 INFO L226 Difference]: Without dead ends: 206 [2018-01-24 20:58:16,963 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 20:58:16,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-01-24 20:58:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 176. [2018-01-24 20:58:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-01-24 20:58:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 188 transitions. [2018-01-24 20:58:17,016 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 188 transitions. Word has length 8 [2018-01-24 20:58:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:17,017 INFO L432 AbstractCegarLoop]: Abstraction has 176 states and 188 transitions. [2018-01-24 20:58:17,017 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:58:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 188 transitions. [2018-01-24 20:58:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:58:17,018 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:17,018 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:17,018 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:17,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1781428785, now seen corresponding path program 1 times [2018-01-24 20:58:17,018 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:17,019 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:17,020 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:17,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:17,020 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:17,041 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:17,116 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 20:58:17,117 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:17,117 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:58:17,117 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:17,119 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:58:17,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:58:17,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:58:17,119 INFO L87 Difference]: Start difference. First operand 176 states and 188 transitions. Second operand 4 states. [2018-01-24 20:58:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:17,304 INFO L93 Difference]: Finished difference Result 209 states and 221 transitions. [2018-01-24 20:58:17,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:58:17,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:58:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:17,306 INFO L225 Difference]: With dead ends: 209 [2018-01-24 20:58:17,306 INFO L226 Difference]: Without dead ends: 199 [2018-01-24 20:58:17,308 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 20:58:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-01-24 20:58:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2018-01-24 20:58:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-01-24 20:58:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 207 transitions. [2018-01-24 20:58:17,322 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 207 transitions. Word has length 8 [2018-01-24 20:58:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:17,323 INFO L432 AbstractCegarLoop]: Abstraction has 188 states and 207 transitions. [2018-01-24 20:58:17,323 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:58:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 207 transitions. [2018-01-24 20:58:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 20:58:17,324 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:17,324 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:17,324 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:17,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1247402511, now seen corresponding path program 1 times [2018-01-24 20:58:17,324 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:17,325 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:17,326 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:17,326 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:17,326 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:17,345 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:17,400 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 20:58:17,401 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:17,401 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:17,401 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:17,401 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:17,402 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:17,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:17,402 INFO L87 Difference]: Start difference. First operand 188 states and 207 transitions. Second operand 5 states. [2018-01-24 20:58:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:17,764 INFO L93 Difference]: Finished difference Result 320 states and 347 transitions. [2018-01-24 20:58:17,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:58:17,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-01-24 20:58:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:17,767 INFO L225 Difference]: With dead ends: 320 [2018-01-24 20:58:17,767 INFO L226 Difference]: Without dead ends: 319 [2018-01-24 20:58:17,768 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:58:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-01-24 20:58:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 187. [2018-01-24 20:58:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-01-24 20:58:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 206 transitions. [2018-01-24 20:58:17,782 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 206 transitions. Word has length 17 [2018-01-24 20:58:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:17,782 INFO L432 AbstractCegarLoop]: Abstraction has 187 states and 206 transitions. [2018-01-24 20:58:17,782 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 206 transitions. [2018-01-24 20:58:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 20:58:17,783 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:17,783 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:17,784 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:17,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1247402512, now seen corresponding path program 1 times [2018-01-24 20:58:17,784 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:17,785 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:17,785 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:17,786 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:17,786 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:17,803 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:17,874 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 20:58:17,875 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:17,875 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:17,875 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:17,875 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:17,876 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:17,876 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:17,876 INFO L87 Difference]: Start difference. First operand 187 states and 206 transitions. Second operand 5 states. [2018-01-24 20:58:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:18,153 INFO L93 Difference]: Finished difference Result 349 states and 386 transitions. [2018-01-24 20:58:18,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:58:18,153 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-01-24 20:58:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:18,155 INFO L225 Difference]: With dead ends: 349 [2018-01-24 20:58:18,155 INFO L226 Difference]: Without dead ends: 348 [2018-01-24 20:58:18,156 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:58:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-01-24 20:58:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 186. [2018-01-24 20:58:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-01-24 20:58:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 205 transitions. [2018-01-24 20:58:18,168 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 205 transitions. Word has length 17 [2018-01-24 20:58:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:18,168 INFO L432 AbstractCegarLoop]: Abstraction has 186 states and 205 transitions. [2018-01-24 20:58:18,169 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 205 transitions. [2018-01-24 20:58:18,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 20:58:18,169 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:18,169 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:18,170 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:18,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1311177125, now seen corresponding path program 1 times [2018-01-24 20:58:18,170 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:18,171 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:18,171 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:18,171 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:18,171 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:18,191 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:18,311 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 20:58:18,312 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:18,312 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:58:18,312 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:18,312 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 20:58:18,313 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 20:58:18,313 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:58:18,313 INFO L87 Difference]: Start difference. First operand 186 states and 205 transitions. Second operand 8 states. [2018-01-24 20:58:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:18,857 INFO L93 Difference]: Finished difference Result 323 states and 348 transitions. [2018-01-24 20:58:18,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:58:18,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-01-24 20:58:18,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:18,860 INFO L225 Difference]: With dead ends: 323 [2018-01-24 20:58:18,860 INFO L226 Difference]: Without dead ends: 322 [2018-01-24 20:58:18,861 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:58:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-01-24 20:58:18,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 185. [2018-01-24 20:58:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-01-24 20:58:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 204 transitions. [2018-01-24 20:58:18,876 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 204 transitions. Word has length 20 [2018-01-24 20:58:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:18,876 INFO L432 AbstractCegarLoop]: Abstraction has 185 states and 204 transitions. [2018-01-24 20:58:18,876 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 20:58:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 204 transitions. [2018-01-24 20:58:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 20:58:18,877 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:18,878 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:18,878 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1311177126, now seen corresponding path program 1 times [2018-01-24 20:58:18,878 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:18,879 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:18,880 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:18,880 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:18,880 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:18,898 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:19,070 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 20:58:19,070 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:19,071 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:58:19,071 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:19,071 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 20:58:19,071 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 20:58:19,072 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:58:19,072 INFO L87 Difference]: Start difference. First operand 185 states and 204 transitions. Second operand 8 states. [2018-01-24 20:58:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:19,664 INFO L93 Difference]: Finished difference Result 325 states and 350 transitions. [2018-01-24 20:58:19,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:58:19,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-01-24 20:58:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:19,665 INFO L225 Difference]: With dead ends: 325 [2018-01-24 20:58:19,666 INFO L226 Difference]: Without dead ends: 324 [2018-01-24 20:58:19,666 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:58:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-01-24 20:58:19,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 184. [2018-01-24 20:58:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-01-24 20:58:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 203 transitions. [2018-01-24 20:58:19,677 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 203 transitions. Word has length 20 [2018-01-24 20:58:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:19,678 INFO L432 AbstractCegarLoop]: Abstraction has 184 states and 203 transitions. [2018-01-24 20:58:19,678 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 20:58:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 203 transitions. [2018-01-24 20:58:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:58:19,679 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:19,679 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 20:58:19,679 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:19,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1745739826, now seen corresponding path program 1 times [2018-01-24 20:58:19,680 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:19,681 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:19,681 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:19,681 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:19,681 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:19,690 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:19,753 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 20:58:19,754 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:19,754 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:58:19,754 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:19,754 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:19,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:19,755 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:19,755 INFO L87 Difference]: Start difference. First operand 184 states and 203 transitions. Second operand 5 states. [2018-01-24 20:58:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:19,914 INFO L93 Difference]: Finished difference Result 428 states and 470 transitions. [2018-01-24 20:58:19,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:58:19,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2018-01-24 20:58:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:19,917 INFO L225 Difference]: With dead ends: 428 [2018-01-24 20:58:19,917 INFO L226 Difference]: Without dead ends: 272 [2018-01-24 20:58:19,918 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:58:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-01-24 20:58:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 188. [2018-01-24 20:58:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-01-24 20:58:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 207 transitions. [2018-01-24 20:58:19,930 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 207 transitions. Word has length 26 [2018-01-24 20:58:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:19,930 INFO L432 AbstractCegarLoop]: Abstraction has 188 states and 207 transitions. [2018-01-24 20:58:19,930 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 207 transitions. [2018-01-24 20:58:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 20:58:19,931 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:19,932 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:19,932 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:19,932 INFO L82 PathProgramCache]: Analyzing trace with hash 33879827, now seen corresponding path program 1 times [2018-01-24 20:58:19,932 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:19,933 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:19,933 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:19,933 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:19,934 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:19,945 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:20,026 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 20:58:20,026 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:20,026 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:20,026 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:20,027 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:20,027 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:20,027 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:20,028 INFO L87 Difference]: Start difference. First operand 188 states and 207 transitions. Second operand 5 states. [2018-01-24 20:58:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:20,163 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2018-01-24 20:58:20,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:58:20,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-24 20:58:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:20,165 INFO L225 Difference]: With dead ends: 210 [2018-01-24 20:58:20,165 INFO L226 Difference]: Without dead ends: 198 [2018-01-24 20:58:20,165 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:58:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-01-24 20:58:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 180. [2018-01-24 20:58:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-01-24 20:58:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 199 transitions. [2018-01-24 20:58:20,172 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 199 transitions. Word has length 28 [2018-01-24 20:58:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:20,172 INFO L432 AbstractCegarLoop]: Abstraction has 180 states and 199 transitions. [2018-01-24 20:58:20,172 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 199 transitions. [2018-01-24 20:58:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 20:58:20,173 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:20,173 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:20,173 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:20,174 INFO L82 PathProgramCache]: Analyzing trace with hash 33879828, now seen corresponding path program 1 times [2018-01-24 20:58:20,174 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:20,174 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:20,175 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:20,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:20,175 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:20,185 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:20,276 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 20:58:20,276 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:20,277 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:58:20,277 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:20,277 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:58:20,277 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:58:20,277 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:58:20,277 INFO L87 Difference]: Start difference. First operand 180 states and 199 transitions. Second operand 7 states. [2018-01-24 20:58:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:20,559 INFO L93 Difference]: Finished difference Result 236 states and 251 transitions. [2018-01-24 20:58:20,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:58:20,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-01-24 20:58:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:20,561 INFO L225 Difference]: With dead ends: 236 [2018-01-24 20:58:20,561 INFO L226 Difference]: Without dead ends: 232 [2018-01-24 20:58:20,561 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:58:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-01-24 20:58:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 207. [2018-01-24 20:58:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-01-24 20:58:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 234 transitions. [2018-01-24 20:58:20,574 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 234 transitions. Word has length 28 [2018-01-24 20:58:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:20,574 INFO L432 AbstractCegarLoop]: Abstraction has 207 states and 234 transitions. [2018-01-24 20:58:20,574 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:58:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 234 transitions. [2018-01-24 20:58:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-24 20:58:20,575 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:20,575 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:20,575 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash -3315817, now seen corresponding path program 1 times [2018-01-24 20:58:20,576 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:20,576 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:20,577 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:20,577 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:20,577 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:20,588 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:20,635 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 20:58:20,635 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:20,635 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:58:20,635 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:20,636 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:58:20,636 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:58:20,636 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:58:20,636 INFO L87 Difference]: Start difference. First operand 207 states and 234 transitions. Second operand 6 states. [2018-01-24 20:58:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:20,941 INFO L93 Difference]: Finished difference Result 296 states and 336 transitions. [2018-01-24 20:58:20,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:58:20,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2018-01-24 20:58:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:20,943 INFO L225 Difference]: With dead ends: 296 [2018-01-24 20:58:20,943 INFO L226 Difference]: Without dead ends: 295 [2018-01-24 20:58:20,944 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:58:20,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-01-24 20:58:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 206. [2018-01-24 20:58:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-01-24 20:58:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 233 transitions. [2018-01-24 20:58:20,954 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 233 transitions. Word has length 31 [2018-01-24 20:58:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:20,955 INFO L432 AbstractCegarLoop]: Abstraction has 206 states and 233 transitions. [2018-01-24 20:58:20,955 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:58:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 233 transitions. [2018-01-24 20:58:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-24 20:58:20,956 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:20,956 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:20,956 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:20,956 INFO L82 PathProgramCache]: Analyzing trace with hash -3315816, now seen corresponding path program 1 times [2018-01-24 20:58:20,956 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:20,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:20,957 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:20,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:20,957 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:20,966 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:21,029 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 20:58:21,029 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:21,030 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:58:21,030 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:21,030 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:58:21,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:58:21,030 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:58:21,030 INFO L87 Difference]: Start difference. First operand 206 states and 233 transitions. Second operand 6 states. [2018-01-24 20:58:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:21,296 INFO L93 Difference]: Finished difference Result 326 states and 374 transitions. [2018-01-24 20:58:21,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 20:58:21,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2018-01-24 20:58:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:21,298 INFO L225 Difference]: With dead ends: 326 [2018-01-24 20:58:21,298 INFO L226 Difference]: Without dead ends: 317 [2018-01-24 20:58:21,299 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-01-24 20:58:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-01-24 20:58:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 191. [2018-01-24 20:58:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-01-24 20:58:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 217 transitions. [2018-01-24 20:58:21,309 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 217 transitions. Word has length 31 [2018-01-24 20:58:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:21,309 INFO L432 AbstractCegarLoop]: Abstraction has 191 states and 217 transitions. [2018-01-24 20:58:21,310 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:58:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 217 transitions. [2018-01-24 20:58:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-24 20:58:21,311 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:21,311 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:21,311 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash 253584673, now seen corresponding path program 1 times [2018-01-24 20:58:21,312 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:21,312 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:21,313 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:21,313 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:21,313 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:21,321 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:21,354 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 20:58:21,354 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:21,354 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:58:21,354 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:21,355 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:21,355 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:21,355 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:21,355 INFO L87 Difference]: Start difference. First operand 191 states and 217 transitions. Second operand 5 states. [2018-01-24 20:58:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:21,495 INFO L93 Difference]: Finished difference Result 269 states and 294 transitions. [2018-01-24 20:58:21,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:58:21,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-24 20:58:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:21,497 INFO L225 Difference]: With dead ends: 269 [2018-01-24 20:58:21,497 INFO L226 Difference]: Without dead ends: 212 [2018-01-24 20:58:21,497 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:58:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-01-24 20:58:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2018-01-24 20:58:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-01-24 20:58:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 215 transitions. [2018-01-24 20:58:21,509 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 215 transitions. Word has length 36 [2018-01-24 20:58:21,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:21,509 INFO L432 AbstractCegarLoop]: Abstraction has 191 states and 215 transitions. [2018-01-24 20:58:21,510 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:21,510 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 215 transitions. [2018-01-24 20:58:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-24 20:58:21,511 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:21,511 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:21,511 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:21,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1898871922, now seen corresponding path program 1 times [2018-01-24 20:58:21,512 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:21,512 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:21,513 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:21,513 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:21,513 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:21,523 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:21,836 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 20:58:21,836 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:21,837 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 20:58:21,837 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:21,837 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 20:58:21,838 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 20:58:21,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:58:21,838 INFO L87 Difference]: Start difference. First operand 191 states and 215 transitions. Second operand 10 states. [2018-01-24 20:58:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:22,490 INFO L93 Difference]: Finished difference Result 420 states and 467 transitions. [2018-01-24 20:58:22,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-24 20:58:22,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-01-24 20:58:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:22,492 INFO L225 Difference]: With dead ends: 420 [2018-01-24 20:58:22,492 INFO L226 Difference]: Without dead ends: 309 [2018-01-24 20:58:22,492 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2018-01-24 20:58:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-01-24 20:58:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 232. [2018-01-24 20:58:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-01-24 20:58:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 260 transitions. [2018-01-24 20:58:22,502 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 260 transitions. Word has length 42 [2018-01-24 20:58:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:22,502 INFO L432 AbstractCegarLoop]: Abstraction has 232 states and 260 transitions. [2018-01-24 20:58:22,503 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 20:58:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 260 transitions. [2018-01-24 20:58:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-24 20:58:22,503 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:22,504 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:22,504 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:22,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1781092500, now seen corresponding path program 1 times [2018-01-24 20:58:22,504 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:22,505 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:22,505 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:22,505 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:22,505 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:22,517 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:22,579 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 20:58:22,579 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:22,579 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:22,579 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:22,580 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:22,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:22,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:22,580 INFO L87 Difference]: Start difference. First operand 232 states and 260 transitions. Second operand 5 states. [2018-01-24 20:58:22,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:22,928 INFO L93 Difference]: Finished difference Result 344 states and 387 transitions. [2018-01-24 20:58:22,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:58:22,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2018-01-24 20:58:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:22,929 INFO L225 Difference]: With dead ends: 344 [2018-01-24 20:58:22,929 INFO L226 Difference]: Without dead ends: 343 [2018-01-24 20:58:22,930 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:58:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-01-24 20:58:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 231. [2018-01-24 20:58:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-01-24 20:58:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 259 transitions. [2018-01-24 20:58:22,940 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 259 transitions. Word has length 43 [2018-01-24 20:58:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:22,940 INFO L432 AbstractCegarLoop]: Abstraction has 231 states and 259 transitions. [2018-01-24 20:58:22,940 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 259 transitions. [2018-01-24 20:58:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-24 20:58:22,942 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:22,942 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:22,942 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:22,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1781092501, now seen corresponding path program 1 times [2018-01-24 20:58:22,942 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:22,943 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:22,943 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:22,943 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:22,943 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:22,953 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:23,145 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 20:58:23,146 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:23,146 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:23,146 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:23,146 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:23,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:23,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:23,146 INFO L87 Difference]: Start difference. First operand 231 states and 259 transitions. Second operand 5 states. [2018-01-24 20:58:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:23,401 INFO L93 Difference]: Finished difference Result 376 states and 426 transitions. [2018-01-24 20:58:23,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:58:23,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2018-01-24 20:58:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:23,403 INFO L225 Difference]: With dead ends: 376 [2018-01-24 20:58:23,403 INFO L226 Difference]: Without dead ends: 375 [2018-01-24 20:58:23,403 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:58:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-01-24 20:58:23,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 230. [2018-01-24 20:58:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-01-24 20:58:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 258 transitions. [2018-01-24 20:58:23,420 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 258 transitions. Word has length 43 [2018-01-24 20:58:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:23,421 INFO L432 AbstractCegarLoop]: Abstraction has 230 states and 258 transitions. [2018-01-24 20:58:23,421 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:23,421 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 258 transitions. [2018-01-24 20:58:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-24 20:58:23,422 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:23,422 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:23,422 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr62EnsuresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:23,422 INFO L82 PathProgramCache]: Analyzing trace with hash -661031902, now seen corresponding path program 1 times [2018-01-24 20:58:23,422 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:23,423 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:23,423 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:23,423 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:23,424 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:23,433 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:23,582 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:58:23,582 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:58:23,584 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2018-01-24 20:58:23,586 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [6], [7], [13], [18], [22], [28], [31], [32], [58], [59], [62], [67], [68], [71], [77], [81], [87], [91], [93], [96], [207], [211], [216], [220], [228], [234], [235], [236], [238], [242], [246], [321], [326], [330], [336], [339], [438], [439], [440] [2018-01-24 20:58:23,633 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:58:23,633 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