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_precise.epf -i ../../../trunk/examples/svcomp/memsafety/test-0521_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:40:26,232 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:40:26,233 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:40:26,247 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:40:26,247 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:40:26,248 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:40:26,249 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:40:26,251 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:40:26,253 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:40:26,254 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:40:26,254 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:40:26,255 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:40:26,255 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:40:26,257 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:40:26,258 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:40:26,260 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:40:26,262 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:40:26,264 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:40:26,265 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:40:26,267 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:40:26,269 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:40:26,269 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:40:26,269 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:40:26,270 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:40:26,271 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:40:26,272 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:40:26,272 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:40:26,273 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:40:26,273 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:40:26,273 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:40:26,274 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:40:26,274 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_precise.epf [2018-01-24 23:40:26,284 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:40:26,285 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:40:26,285 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:40:26,286 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:40:26,286 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:40:26,286 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:40:26,286 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:40:26,286 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:40:26,287 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:40:26,287 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:40:26,287 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:40:26,288 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:40:26,288 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:40:26,288 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:40:26,288 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:40:26,288 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:40:26,289 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:40:26,289 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:40:26,289 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:40:26,289 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:40:26,289 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:40:26,290 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:40:26,290 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:40:26,290 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:40:26,290 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:40:26,291 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:40:26,291 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:40:26,291 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:40:26,291 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:40:26,291 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:40:26,291 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:40:26,292 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:40:26,292 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:40:26,292 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:40:26,293 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:40:26,293 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:40:26,328 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:40:26,341 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:40:26,345 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:40:26,347 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:40:26,347 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:40:26,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0521_true-valid-memsafety.i [2018-01-24 23:40:26,540 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:40:26,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:40:26,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:40:26,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:40:26,554 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:40:26,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:40:26" (1/1) ... [2018-01-24 23:40:26,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8bf943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26, skipping insertion in model container [2018-01-24 23:40:26,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:40:26" (1/1) ... [2018-01-24 23:40:26,574 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:40:26,616 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:40:26,741 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:40:26,775 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:40:26,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26 WrapperNode [2018-01-24 23:40:26,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:40:26,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:40:26,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:40:26,784 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:40:26,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26" (1/1) ... [2018-01-24 23:40:26,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26" (1/1) ... [2018-01-24 23:40:26,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26" (1/1) ... [2018-01-24 23:40:26,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26" (1/1) ... [2018-01-24 23:40:26,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26" (1/1) ... [2018-01-24 23:40:26,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26" (1/1) ... [2018-01-24 23:40:26,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26" (1/1) ... [2018-01-24 23:40:26,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:40:26,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:40:26,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:40:26,829 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:40:26,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26" (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 23:40:26,886 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:40:26,886 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:40:26,886 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:40:26,886 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:40:26,886 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:40:26,887 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 23:40:26,887 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 23:40:26,887 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:40:26,887 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:40:26,887 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:40:26,887 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 23:40:26,887 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-24 23:40:26,888 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:40:26,888 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:40:26,888 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:40:26,888 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:40:27,707 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:40:27,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:40:27 BoogieIcfgContainer [2018-01-24 23:40:27,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:40:27,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:40:27,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:40:27,712 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:40:27,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:40:26" (1/3) ... [2018-01-24 23:40:27,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef7d572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:40:27, skipping insertion in model container [2018-01-24 23:40:27,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:40:26" (2/3) ... [2018-01-24 23:40:27,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef7d572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:40:27, skipping insertion in model container [2018-01-24 23:40:27,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:40:27" (3/3) ... [2018-01-24 23:40:27,717 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0521_true-valid-memsafety.i [2018-01-24 23:40:27,726 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:40:27,735 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 91 error locations. [2018-01-24 23:40:27,810 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:40:27,810 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:40:27,810 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:40:27,810 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:40:27,810 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:40:27,810 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:40:27,810 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:40:27,810 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:40:27,811 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:40:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states. [2018-01-24 23:40:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-24 23:40:27,837 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:27,838 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:40:27,838 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:27,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2006593009, now seen corresponding path program 1 times [2018-01-24 23:40:27,844 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:27,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:27,882 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:27,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:27,883 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:27,923 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:27,950 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 23:40:27,951 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:27,952 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:40:27,952 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:27,954 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 23:40:28,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 23:40:28,031 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 23:40:28,032 INFO L87 Difference]: Start difference. First operand 247 states. Second operand 2 states. [2018-01-24 23:40:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:28,063 INFO L93 Difference]: Finished difference Result 488 states and 562 transitions. [2018-01-24 23:40:28,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 23:40:28,064 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-01-24 23:40:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:28,074 INFO L225 Difference]: With dead ends: 488 [2018-01-24 23:40:28,075 INFO L226 Difference]: Without dead ends: 244 [2018-01-24 23:40:28,078 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 23:40:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-01-24 23:40:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-01-24 23:40:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-01-24 23:40:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 271 transitions. [2018-01-24 23:40:28,118 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 271 transitions. Word has length 10 [2018-01-24 23:40:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:28,118 INFO L432 AbstractCegarLoop]: Abstraction has 244 states and 271 transitions. [2018-01-24 23:40:28,118 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 23:40:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 271 transitions. [2018-01-24 23:40:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 23:40:28,118 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:28,119 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:40:28,119 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:28,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1287736010, now seen corresponding path program 1 times [2018-01-24 23:40:28,119 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:28,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:28,120 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:28,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:28,120 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:28,135 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:28,207 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 23:40:28,207 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:28,208 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:40:28,208 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:28,209 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:40:28,210 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:40:28,210 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:40:28,210 INFO L87 Difference]: Start difference. First operand 244 states and 271 transitions. Second operand 4 states. [2018-01-24 23:40:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:28,437 INFO L93 Difference]: Finished difference Result 773 states and 860 transitions. [2018-01-24 23:40:28,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:40:28,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-01-24 23:40:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:28,442 INFO L225 Difference]: With dead ends: 773 [2018-01-24 23:40:28,442 INFO L226 Difference]: Without dead ends: 561 [2018-01-24 23:40:28,445 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:40:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2018-01-24 23:40:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 256. [2018-01-24 23:40:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-01-24 23:40:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2018-01-24 23:40:28,468 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 12 [2018-01-24 23:40:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:28,468 INFO L432 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2018-01-24 23:40:28,468 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:40:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2018-01-24 23:40:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:40:28,469 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:28,469 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:40:28,469 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1264312096, now seen corresponding path program 1 times [2018-01-24 23:40:28,470 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:28,471 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:28,471 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:28,471 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:28,471 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:28,483 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:28,528 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 23:40:28,528 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:28,528 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:40:28,528 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:28,529 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:40:28,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:40:28,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:40:28,529 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand 4 states. [2018-01-24 23:40:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:28,976 INFO L93 Difference]: Finished difference Result 418 states and 466 transitions. [2018-01-24 23:40:29,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:40:29,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 23:40:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:29,012 INFO L225 Difference]: With dead ends: 418 [2018-01-24 23:40:29,012 INFO L226 Difference]: Without dead ends: 416 [2018-01-24 23:40:29,012 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:40:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2018-01-24 23:40:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 254. [2018-01-24 23:40:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-01-24 23:40:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 283 transitions. [2018-01-24 23:40:29,028 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 283 transitions. Word has length 13 [2018-01-24 23:40:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:29,028 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 283 transitions. [2018-01-24 23:40:29,028 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:40:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 283 transitions. [2018-01-24 23:40:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:40:29,029 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:29,029 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:40:29,031 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1264312095, now seen corresponding path program 1 times [2018-01-24 23:40:29,031 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:29,032 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:29,032 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:29,032 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:29,032 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:29,043 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:29,096 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 23:40:29,096 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:29,096 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:40:29,096 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:29,097 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:40:29,097 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:40:29,097 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:40:29,097 INFO L87 Difference]: Start difference. First operand 254 states and 283 transitions. Second operand 4 states. [2018-01-24 23:40:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:29,288 INFO L93 Difference]: Finished difference Result 351 states and 394 transitions. [2018-01-24 23:40:29,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:40:29,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 23:40:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:29,290 INFO L225 Difference]: With dead ends: 351 [2018-01-24 23:40:29,291 INFO L226 Difference]: Without dead ends: 349 [2018-01-24 23:40:29,291 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:40:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-01-24 23:40:29,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 252. [2018-01-24 23:40:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-24 23:40:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 281 transitions. [2018-01-24 23:40:29,300 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 281 transitions. Word has length 13 [2018-01-24 23:40:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:29,300 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 281 transitions. [2018-01-24 23:40:29,300 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:40:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 281 transitions. [2018-01-24 23:40:29,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:40:29,301 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:29,301 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 23:40:29,301 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:29,301 INFO L82 PathProgramCache]: Analyzing trace with hash 184691868, now seen corresponding path program 1 times [2018-01-24 23:40:29,301 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:29,302 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:29,302 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:29,303 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:29,303 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:29,313 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:29,359 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 23:40:29,359 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:29,360 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:40:29,360 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:29,360 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:40:29,360 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:40:29,361 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:40:29,361 INFO L87 Difference]: Start difference. First operand 252 states and 281 transitions. Second operand 5 states. [2018-01-24 23:40:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:29,446 INFO L93 Difference]: Finished difference Result 499 states and 558 transitions. [2018-01-24 23:40:29,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:40:29,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-01-24 23:40:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:29,449 INFO L225 Difference]: With dead ends: 499 [2018-01-24 23:40:29,449 INFO L226 Difference]: Without dead ends: 327 [2018-01-24 23:40:29,450 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 23:40:29,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-01-24 23:40:29,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2018-01-24 23:40:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-01-24 23:40:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 344 transitions. [2018-01-24 23:40:29,463 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 344 transitions. Word has length 20 [2018-01-24 23:40:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:29,464 INFO L432 AbstractCegarLoop]: Abstraction has 292 states and 344 transitions. [2018-01-24 23:40:29,464 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:40:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 344 transitions. [2018-01-24 23:40:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:40:29,465 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:29,465 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 23:40:29,465 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:29,465 INFO L82 PathProgramCache]: Analyzing trace with hash 415972895, now seen corresponding path program 1 times [2018-01-24 23:40:29,466 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:29,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:29,467 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:29,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:29,467 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:29,482 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:29,520 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 23:40:29,520 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:29,520 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:40:29,521 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:29,521 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:40:29,521 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:40:29,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:40:29,522 INFO L87 Difference]: Start difference. First operand 292 states and 344 transitions. Second operand 4 states. [2018-01-24 23:40:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:29,787 INFO L93 Difference]: Finished difference Result 456 states and 526 transitions. [2018-01-24 23:40:29,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:40:29,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-24 23:40:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:29,789 INFO L225 Difference]: With dead ends: 456 [2018-01-24 23:40:29,790 INFO L226 Difference]: Without dead ends: 454 [2018-01-24 23:40:29,790 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:40:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2018-01-24 23:40:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 290. [2018-01-24 23:40:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-01-24 23:40:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 342 transitions. [2018-01-24 23:40:29,803 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 342 transitions. Word has length 20 [2018-01-24 23:40:29,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:29,804 INFO L432 AbstractCegarLoop]: Abstraction has 290 states and 342 transitions. [2018-01-24 23:40:29,804 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:40:29,804 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 342 transitions. [2018-01-24 23:40:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:40:29,805 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:29,805 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 23:40:29,805 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:29,805 INFO L82 PathProgramCache]: Analyzing trace with hash 415972896, now seen corresponding path program 1 times [2018-01-24 23:40:29,806 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:29,806 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:29,807 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:29,807 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:29,807 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:29,821 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:29,897 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 23:40:29,897 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:29,897 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:40:29,897 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:29,898 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:40:29,898 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:40:29,898 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:40:29,898 INFO L87 Difference]: Start difference. First operand 290 states and 342 transitions. Second operand 4 states. [2018-01-24 23:40:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:30,093 INFO L93 Difference]: Finished difference Result 389 states and 454 transitions. [2018-01-24 23:40:30,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:40:30,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-24 23:40:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:30,096 INFO L225 Difference]: With dead ends: 389 [2018-01-24 23:40:30,096 INFO L226 Difference]: Without dead ends: 387 [2018-01-24 23:40:30,096 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:40:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-01-24 23:40:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 288. [2018-01-24 23:40:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-01-24 23:40:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 340 transitions. [2018-01-24 23:40:30,107 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 340 transitions. Word has length 20 [2018-01-24 23:40:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:30,108 INFO L432 AbstractCegarLoop]: Abstraction has 288 states and 340 transitions. [2018-01-24 23:40:30,108 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:40:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 340 transitions. [2018-01-24 23:40:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:40:30,109 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:30,109 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] [2018-01-24 23:40:30,109 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:30,109 INFO L82 PathProgramCache]: Analyzing trace with hash 308407885, now seen corresponding path program 1 times [2018-01-24 23:40:30,109 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:30,110 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:30,110 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:30,111 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:30,111 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:30,119 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:30,175 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 23:40:30,176 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:30,176 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:40:30,176 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:30,176 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:40:30,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:40:30,176 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:40:30,177 INFO L87 Difference]: Start difference. First operand 288 states and 340 transitions. Second operand 5 states. [2018-01-24 23:40:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:30,534 INFO L93 Difference]: Finished difference Result 408 states and 471 transitions. [2018-01-24 23:40:30,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:40:30,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-01-24 23:40:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:30,535 INFO L225 Difference]: With dead ends: 408 [2018-01-24 23:40:30,536 INFO L226 Difference]: Without dead ends: 319 [2018-01-24 23:40:30,536 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:40:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-01-24 23:40:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 275. [2018-01-24 23:40:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-01-24 23:40:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 307 transitions. [2018-01-24 23:40:30,544 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 307 transitions. Word has length 23 [2018-01-24 23:40:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:30,545 INFO L432 AbstractCegarLoop]: Abstraction has 275 states and 307 transitions. [2018-01-24 23:40:30,545 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:40:30,545 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 307 transitions. [2018-01-24 23:40:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 23:40:30,546 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:30,546 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:40:30,546 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:30,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1728935830, now seen corresponding path program 1 times [2018-01-24 23:40:30,547 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:30,548 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:30,548 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:30,548 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:30,548 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:30,562 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:40:30,631 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:30,631 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:40:30,631 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:30,632 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:40:30,632 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:40:30,632 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:40:30,632 INFO L87 Difference]: Start difference. First operand 275 states and 307 transitions. Second operand 5 states. [2018-01-24 23:40:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:31,072 INFO L93 Difference]: Finished difference Result 460 states and 514 transitions. [2018-01-24 23:40:31,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:40:31,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-24 23:40:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:31,075 INFO L225 Difference]: With dead ends: 460 [2018-01-24 23:40:31,075 INFO L226 Difference]: Without dead ends: 457 [2018-01-24 23:40:31,075 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:40:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2018-01-24 23:40:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 276. [2018-01-24 23:40:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-01-24 23:40:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 310 transitions. [2018-01-24 23:40:31,086 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 310 transitions. Word has length 28 [2018-01-24 23:40:31,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:31,086 INFO L432 AbstractCegarLoop]: Abstraction has 276 states and 310 transitions. [2018-01-24 23:40:31,086 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:40:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 310 transitions. [2018-01-24 23:40:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 23:40:31,088 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:31,088 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:40:31,088 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:31,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1728935829, now seen corresponding path program 1 times [2018-01-24 23:40:31,088 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:31,089 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:31,089 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:31,090 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:31,090 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:31,104 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:40:31,191 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:31,191 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:40:31,191 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:31,191 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:40:31,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:40:31,192 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:40:31,192 INFO L87 Difference]: Start difference. First operand 276 states and 310 transitions. Second operand 6 states. [2018-01-24 23:40:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:31,496 INFO L93 Difference]: Finished difference Result 388 states and 438 transitions. [2018-01-24 23:40:31,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:40:31,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-24 23:40:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:31,498 INFO L225 Difference]: With dead ends: 388 [2018-01-24 23:40:31,498 INFO L226 Difference]: Without dead ends: 387 [2018-01-24 23:40:31,498 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:40:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-01-24 23:40:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 275. [2018-01-24 23:40:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-01-24 23:40:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 309 transitions. [2018-01-24 23:40:31,506 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 309 transitions. Word has length 28 [2018-01-24 23:40:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:31,506 INFO L432 AbstractCegarLoop]: Abstraction has 275 states and 309 transitions. [2018-01-24 23:40:31,506 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:40:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 309 transitions. [2018-01-24 23:40:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 23:40:31,507 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:31,508 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:40:31,508 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash -887445228, now seen corresponding path program 1 times [2018-01-24 23:40:31,508 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:31,509 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:31,509 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:31,509 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:31,509 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:31,517 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:31,552 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 23:40:31,553 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:31,553 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:40:31,553 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:31,553 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:40:31,554 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:40:31,554 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:40:31,554 INFO L87 Difference]: Start difference. First operand 275 states and 309 transitions. Second operand 3 states. [2018-01-24 23:40:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:31,672 INFO L93 Difference]: Finished difference Result 279 states and 312 transitions. [2018-01-24 23:40:31,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:40:31,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2018-01-24 23:40:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:31,673 INFO L225 Difference]: With dead ends: 279 [2018-01-24 23:40:31,674 INFO L226 Difference]: Without dead ends: 255 [2018-01-24 23:40:31,674 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:40:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-01-24 23:40:31,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-01-24 23:40:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-01-24 23:40:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2018-01-24 23:40:31,683 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 30 [2018-01-24 23:40:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:31,683 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2018-01-24 23:40:31,683 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:40:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2018-01-24 23:40:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-24 23:40:31,684 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:31,684 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] [2018-01-24 23:40:31,684 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:31,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1380917583, now seen corresponding path program 1 times [2018-01-24 23:40:31,685 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:31,685 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:31,685 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:31,686 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:31,686 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:31,706 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:40:31,868 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:31,868 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-24 23:40:31,868 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:31,869 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 23:40:31,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 23:40:31,869 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:40:31,869 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand 12 states. [2018-01-24 23:40:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:33,612 INFO L93 Difference]: Finished difference Result 1031 states and 1163 transitions. [2018-01-24 23:40:33,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-24 23:40:33,613 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-01-24 23:40:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:33,616 INFO L225 Difference]: With dead ends: 1031 [2018-01-24 23:40:33,616 INFO L226 Difference]: Without dead ends: 1030 [2018-01-24 23:40:33,617 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2018-01-24 23:40:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2018-01-24 23:40:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 253. [2018-01-24 23:40:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-01-24 23:40:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 284 transitions. [2018-01-24 23:40:33,625 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 284 transitions. Word has length 32 [2018-01-24 23:40:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:33,625 INFO L432 AbstractCegarLoop]: Abstraction has 253 states and 284 transitions. [2018-01-24 23:40:33,625 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 23:40:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 284 transitions. [2018-01-24 23:40:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-24 23:40:33,626 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:33,626 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] [2018-01-24 23:40:33,627 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1380917584, now seen corresponding path program 1 times [2018-01-24 23:40:33,627 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:33,628 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:33,628 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:33,628 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:33,628 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:33,642 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:40:33,846 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:33,846 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 23:40:33,846 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:33,846 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 23:40:33,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 23:40:33,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-01-24 23:40:33,847 INFO L87 Difference]: Start difference. First operand 253 states and 284 transitions. Second operand 11 states. [2018-01-24 23:40:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:35,319 INFO L93 Difference]: Finished difference Result 1176 states and 1332 transitions. [2018-01-24 23:40:35,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-24 23:40:35,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-01-24 23:40:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:35,324 INFO L225 Difference]: With dead ends: 1176 [2018-01-24 23:40:35,324 INFO L226 Difference]: Without dead ends: 1175 [2018-01-24 23:40:35,325 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2018-01-24 23:40:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2018-01-24 23:40:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 252. [2018-01-24 23:40:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-24 23:40:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2018-01-24 23:40:35,336 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 32 [2018-01-24 23:40:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:35,336 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2018-01-24 23:40:35,336 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 23:40:35,336 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2018-01-24 23:40:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 23:40:35,337 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:35,337 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] [2018-01-24 23:40:35,337 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989974, now seen corresponding path program 1 times [2018-01-24 23:40:35,338 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:35,338 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:35,339 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:35,339 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:35,339 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:35,352 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 23:40:35,421 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:35,421 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:40:35,421 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:35,421 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:40:35,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:40:35,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:40:35,422 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand 4 states. [2018-01-24 23:40:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:35,731 INFO L93 Difference]: Finished difference Result 777 states and 874 transitions. [2018-01-24 23:40:35,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:40:35,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-01-24 23:40:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:35,734 INFO L225 Difference]: With dead ends: 777 [2018-01-24 23:40:35,734 INFO L226 Difference]: Without dead ends: 775 [2018-01-24 23:40:35,734 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 23:40:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2018-01-24 23:40:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 250. [2018-01-24 23:40:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-01-24 23:40:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2018-01-24 23:40:35,745 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 35 [2018-01-24 23:40:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:35,746 INFO L432 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2018-01-24 23:40:35,746 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:40:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2018-01-24 23:40:35,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 23:40:35,747 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:35,747 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] [2018-01-24 23:40:35,747 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989975, now seen corresponding path program 1 times [2018-01-24 23:40:35,747 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:35,748 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:35,748 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:35,748 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:35,748 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:35,762 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:40:35,847 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:35,847 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:40:35,847 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:35,847 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:40:35,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:40:35,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:40:35,847 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand 6 states. [2018-01-24 23:40:36,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:36,240 INFO L93 Difference]: Finished difference Result 476 states and 543 transitions. [2018-01-24 23:40:36,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:40:36,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2018-01-24 23:40:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:36,242 INFO L225 Difference]: With dead ends: 476 [2018-01-24 23:40:36,242 INFO L226 Difference]: Without dead ends: 474 [2018-01-24 23:40:36,243 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:40:36,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2018-01-24 23:40:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 256. [2018-01-24 23:40:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-01-24 23:40:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 292 transitions. [2018-01-24 23:40:36,253 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 292 transitions. Word has length 35 [2018-01-24 23:40:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:36,253 INFO L432 AbstractCegarLoop]: Abstraction has 256 states and 292 transitions. [2018-01-24 23:40:36,253 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:40:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 292 transitions. [2018-01-24 23:40:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-24 23:40:36,254 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:36,254 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] [2018-01-24 23:40:36,254 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash 320441296, now seen corresponding path program 1 times [2018-01-24 23:40:36,254 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:36,255 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:36,255 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:36,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:36,256 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:36,268 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:40:36,315 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:36,316 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:40:36,316 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:36,316 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:40:36,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:40:36,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:40:36,316 INFO L87 Difference]: Start difference. First operand 256 states and 292 transitions. Second operand 6 states. [2018-01-24 23:40:36,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:36,441 INFO L93 Difference]: Finished difference Result 641 states and 718 transitions. [2018-01-24 23:40:36,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:40:36,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-24 23:40:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:36,444 INFO L225 Difference]: With dead ends: 641 [2018-01-24 23:40:36,445 INFO L226 Difference]: Without dead ends: 453 [2018-01-24 23:40:36,446 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:40:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-01-24 23:40:36,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 254. [2018-01-24 23:40:36,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-01-24 23:40:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 287 transitions. [2018-01-24 23:40:36,460 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 287 transitions. Word has length 36 [2018-01-24 23:40:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:36,461 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 287 transitions. [2018-01-24 23:40:36,461 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:40:36,461 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 287 transitions. [2018-01-24 23:40:36,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 23:40:36,462 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:36,462 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] [2018-01-24 23:40:36,462 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1534000121, now seen corresponding path program 1 times [2018-01-24 23:40:36,463 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:36,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:36,464 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:36,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:36,464 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:36,482 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:40:36,921 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:40:36,921 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-01-24 23:40:36,921 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:40:36,922 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-24 23:40:36,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-24 23:40:36,922 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-01-24 23:40:36,922 INFO L87 Difference]: Start difference. First operand 254 states and 287 transitions. Second operand 16 states. [2018-01-24 23:40:38,288 WARN L146 SmtUtils]: Spent 103ms on a formula simplification. DAG size of input: 93 DAG size of output 81 [2018-01-24 23:40:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:40:39,016 INFO L93 Difference]: Finished difference Result 896 states and 1011 transitions. [2018-01-24 23:40:39,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-24 23:40:39,017 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2018-01-24 23:40:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:40:39,020 INFO L225 Difference]: With dead ends: 896 [2018-01-24 23:40:39,020 INFO L226 Difference]: Without dead ends: 685 [2018-01-24 23:40:39,021 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2018-01-24 23:40:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2018-01-24 23:40:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 247. [2018-01-24 23:40:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-01-24 23:40:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 275 transitions. [2018-01-24 23:40:39,034 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 275 transitions. Word has length 38 [2018-01-24 23:40:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:40:39,035 INFO L432 AbstractCegarLoop]: Abstraction has 247 states and 275 transitions. [2018-01-24 23:40:39,035 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-24 23:40:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 275 transitions. [2018-01-24 23:40:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 23:40:39,035 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:40:39,036 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] [2018-01-24 23:40:39,036 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 23:40:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1535290008, now seen corresponding path program 1 times [2018-01-24 23:40:39,036 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:40:39,037 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:39,037 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:40:39,037 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:40:39,037 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:40:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:40:39,054 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:40:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:40:39,463 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:40:39,463 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:40:39,464 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-01-24 23:40:39,466 INFO L201 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [12], [13], [18], [20], [23], [24], [27], [28], [29], [34], [36], [39], [42], [46], [49], [50], [53], [57], [62], [63], [66], [71], [72], [75], [78], [80], [429], [430], [434], [435], [436] [2018-01-24 23:40:39,517 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:40:39,517 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