java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-token_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:58:11,548 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:58:11,549 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:58:11,563 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:58:11,563 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:58:11,564 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:58:11,565 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:58:11,566 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:58:11,567 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:58:11,568 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:58:11,569 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:58:11,569 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:58:11,570 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:58:11,571 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:58:11,572 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:58:11,575 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:58:11,577 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:58:11,579 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:58:11,580 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:58:11,581 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:58:11,583 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:58:11,584 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:58:11,584 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:58:11,585 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:58:11,585 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:58:11,587 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:58:11,587 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:58:11,587 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:58:11,588 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:58:11,588 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:58:11,588 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:58:11,589 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 20:58:11,598 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:58:11,598 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:58:11,599 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:58:11,599 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:58:11,600 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:58:11,600 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:58:11,600 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:58:11,600 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:58:11,600 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:58:11,601 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:58:11,601 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:58:11,601 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:58:11,602 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:58:11,602 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:58:11,602 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:58:11,602 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:58:11,602 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:58:11,603 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:58:11,603 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:58:11,603 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:58:11,603 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:58:11,603 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:58:11,604 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:58:11,604 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:58:11,604 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:58:11,604 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:58:11,604 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:58:11,605 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:58:11,605 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:58:11,605 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:58:11,605 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:58:11,605 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:58:11,606 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:58:11,606 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:58:11,606 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:58:11,607 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:58:11,607 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:58:11,643 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:58:11,655 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:58:11,660 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:58:11,661 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:58:11,661 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:58:11,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-token_true-unreach-call_true-valid-memsafety.i [2018-01-24 20:58:11,838 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:58:11,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:58:11,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:58:11,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:58:11,848 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:58:11,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:58:11" (1/1) ... [2018-01-24 20:58:11,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e82129b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:11, skipping insertion in model container [2018-01-24 20:58:11,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:58:11" (1/1) ... [2018-01-24 20:58:11,864 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:58:11,903 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:58:12,023 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:58:12,046 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:58:12,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12 WrapperNode [2018-01-24 20:58:12,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:58:12,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:58:12,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:58:12,054 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:58:12,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12" (1/1) ... [2018-01-24 20:58:12,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12" (1/1) ... [2018-01-24 20:58:12,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12" (1/1) ... [2018-01-24 20:58:12,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12" (1/1) ... [2018-01-24 20:58:12,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12" (1/1) ... [2018-01-24 20:58:12,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12" (1/1) ... [2018-01-24 20:58:12,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12" (1/1) ... [2018-01-24 20:58:12,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:58:12,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:58:12,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:58:12,105 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:58:12,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:58:12,167 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:58:12,168 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:58:12,168 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:58:12,168 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:58:12,168 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:58:12,168 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:58:12,169 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:58:12,169 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:58:12,169 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:58:12,169 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:58:12,169 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:58:12,169 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:58:12,170 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:58:12,170 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 20:58:12,170 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:58:12,170 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:58:12,170 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:58:12,632 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:58:12,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:58:12 BoogieIcfgContainer [2018-01-24 20:58:12,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:58:12,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:58:12,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:58:12,636 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:58:12,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:58:11" (1/3) ... [2018-01-24 20:58:12,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f41b588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:58:12, skipping insertion in model container [2018-01-24 20:58:12,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:58:12" (2/3) ... [2018-01-24 20:58:12,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f41b588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:58:12, skipping insertion in model container [2018-01-24 20:58:12,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:58:12" (3/3) ... [2018-01-24 20:58:12,639 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-token_true-unreach-call_true-valid-memsafety.i [2018-01-24 20:58:12,645 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:58:12,652 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 55 error locations. [2018-01-24 20:58:12,689 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:58:12,689 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:58:12,689 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:58:12,689 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:58:12,689 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:58:12,689 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:58:12,689 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:58:12,690 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:58:12,690 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:58:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2018-01-24 20:58:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:58:12,713 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:12,714 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:12,715 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash 460791465, now seen corresponding path program 1 times [2018-01-24 20:58:12,720 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:12,760 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:12,760 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:12,761 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:12,761 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:12,804 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:12,868 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:12,869 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:58:12,869 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:12,872 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:58:12,885 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:58:12,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:58:12,888 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 4 states. [2018-01-24 20:58:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:13,218 INFO L93 Difference]: Finished difference Result 269 states and 320 transitions. [2018-01-24 20:58:13,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:58:13,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:58:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:13,229 INFO L225 Difference]: With dead ends: 269 [2018-01-24 20:58:13,230 INFO L226 Difference]: Without dead ends: 149 [2018-01-24 20:58:13,233 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-01-24 20:58:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2018-01-24 20:58:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-01-24 20:58:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-01-24 20:58:13,269 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 8 [2018-01-24 20:58:13,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:13,269 INFO L432 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-01-24 20:58:13,270 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:58:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-01-24 20:58:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:58:13,270 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:13,270 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:13,271 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash 460791466, now seen corresponding path program 1 times [2018-01-24 20:58:13,271 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:13,272 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:13,272 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:13,272 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:13,273 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:13,288 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:13,350 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:13,350 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:58:13,350 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:13,352 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:58:13,352 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:58:13,352 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:58:13,353 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 4 states. [2018-01-24 20:58:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:13,485 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-01-24 20:58:13,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:58:13,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:58:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:13,487 INFO L225 Difference]: With dead ends: 149 [2018-01-24 20:58:13,487 INFO L226 Difference]: Without dead ends: 146 [2018-01-24 20:58:13,489 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-24 20:58:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 122. [2018-01-24 20:58:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-24 20:58:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-01-24 20:58:13,501 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 8 [2018-01-24 20:58:13,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:13,501 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-01-24 20:58:13,501 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:58:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-01-24 20:58:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 20:58:13,502 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:13,502 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:13,502 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:13,503 INFO L82 PathProgramCache]: Analyzing trace with hash 108566574, now seen corresponding path program 1 times [2018-01-24 20:58:13,503 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:13,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:13,504 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:13,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:13,505 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:13,524 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:13,621 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:13,621 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:13,621 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:13,621 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:13,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:13,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:13,622 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 5 states. [2018-01-24 20:58:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:13,911 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2018-01-24 20:58:13,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:58:13,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 20:58:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:13,914 INFO L225 Difference]: With dead ends: 241 [2018-01-24 20:58:13,915 INFO L226 Difference]: Without dead ends: 223 [2018-01-24 20:58:13,915 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:58:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-01-24 20:58:13,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 165. [2018-01-24 20:58:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-01-24 20:58:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 194 transitions. [2018-01-24 20:58:13,932 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 194 transitions. Word has length 15 [2018-01-24 20:58:13,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:13,932 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 194 transitions. [2018-01-24 20:58:13,932 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 194 transitions. [2018-01-24 20:58:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 20:58:13,933 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:13,933 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:13,933 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash 108566573, now seen corresponding path program 1 times [2018-01-24 20:58:13,934 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:13,935 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:13,935 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:13,935 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:13,935 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:13,950 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:13,997 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:13,999 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:58:13,999 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:14,000 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:58:14,000 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:58:14,000 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:58:14,001 INFO L87 Difference]: Start difference. First operand 165 states and 194 transitions. Second operand 4 states. [2018-01-24 20:58:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:14,167 INFO L93 Difference]: Finished difference Result 169 states and 194 transitions. [2018-01-24 20:58:14,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:58:14,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-24 20:58:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:14,168 INFO L225 Difference]: With dead ends: 169 [2018-01-24 20:58:14,169 INFO L226 Difference]: Without dead ends: 152 [2018-01-24 20:58:14,169 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-01-24 20:58:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-01-24 20:58:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-24 20:58:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2018-01-24 20:58:14,181 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 15 [2018-01-24 20:58:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:14,182 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2018-01-24 20:58:14,182 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:58:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2018-01-24 20:58:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:58:14,183 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:14,183 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:14,183 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:14,183 INFO L82 PathProgramCache]: Analyzing trace with hash 197081690, now seen corresponding path program 1 times [2018-01-24 20:58:14,183 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:14,184 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:14,184 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:14,184 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:14,184 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:14,205 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:14,296 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:14,297 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:14,297 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:14,297 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:14,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:14,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:14,297 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand 5 states. [2018-01-24 20:58:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:14,528 INFO L93 Difference]: Finished difference Result 241 states and 257 transitions. [2018-01-24 20:58:14,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:58:14,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 20:58:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:14,560 INFO L225 Difference]: With dead ends: 241 [2018-01-24 20:58:14,560 INFO L226 Difference]: Without dead ends: 240 [2018-01-24 20:58:14,561 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:58:14,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-01-24 20:58:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 149. [2018-01-24 20:58:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-01-24 20:58:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2018-01-24 20:58:14,574 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 18 [2018-01-24 20:58:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:14,574 INFO L432 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2018-01-24 20:58:14,574 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2018-01-24 20:58:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:58:14,575 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:14,575 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:14,575 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:14,575 INFO L82 PathProgramCache]: Analyzing trace with hash 197081689, now seen corresponding path program 1 times [2018-01-24 20:58:14,575 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:14,576 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:14,576 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:14,576 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:14,577 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:14,591 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:14,637 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:14,637 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:14,638 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:14,638 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:14,638 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:14,638 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:14,639 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand 5 states. [2018-01-24 20:58:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:14,840 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2018-01-24 20:58:14,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:58:14,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 20:58:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:14,842 INFO L225 Difference]: With dead ends: 213 [2018-01-24 20:58:14,842 INFO L226 Difference]: Without dead ends: 212 [2018-01-24 20:58:14,842 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:58:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-01-24 20:58:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 148. [2018-01-24 20:58:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-01-24 20:58:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2018-01-24 20:58:14,850 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 18 [2018-01-24 20:58:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:14,851 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2018-01-24 20:58:14,851 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2018-01-24 20:58:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 20:58:14,851 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:14,852 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:14,852 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1794584241, now seen corresponding path program 1 times [2018-01-24 20:58:14,852 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:14,853 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:14,853 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:14,853 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:14,853 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:14,867 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:14,915 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:14,915 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:14,915 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:14,916 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:14,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:14,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:14,916 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand 5 states. [2018-01-24 20:58:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:15,032 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2018-01-24 20:58:15,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:58:15,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-01-24 20:58:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:15,033 INFO L225 Difference]: With dead ends: 150 [2018-01-24 20:58:15,033 INFO L226 Difference]: Without dead ends: 149 [2018-01-24 20:58:15,034 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:58:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-01-24 20:58:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2018-01-24 20:58:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-01-24 20:58:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 156 transitions. [2018-01-24 20:58:15,041 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 156 transitions. Word has length 19 [2018-01-24 20:58:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:15,041 INFO L432 AbstractCegarLoop]: Abstraction has 147 states and 156 transitions. [2018-01-24 20:58:15,041 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 156 transitions. [2018-01-24 20:58:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 20:58:15,042 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:15,042 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:15,042 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1794584242, now seen corresponding path program 1 times [2018-01-24 20:58:15,042 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:15,043 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:15,043 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:15,043 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:15,043 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:15,058 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:15,129 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:15,129 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:58:15,129 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:15,129 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:58:15,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:58:15,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:58:15,130 INFO L87 Difference]: Start difference. First operand 147 states and 156 transitions. Second operand 5 states. [2018-01-24 20:58:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:15,255 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2018-01-24 20:58:15,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:58:15,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-01-24 20:58:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:15,256 INFO L225 Difference]: With dead ends: 147 [2018-01-24 20:58:15,256 INFO L226 Difference]: Without dead ends: 146 [2018-01-24 20:58:15,256 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:58:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-24 20:58:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-01-24 20:58:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-01-24 20:58:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2018-01-24 20:58:15,262 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 19 [2018-01-24 20:58:15,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:15,263 INFO L432 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2018-01-24 20:58:15,263 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:58:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2018-01-24 20:58:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 20:58:15,264 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:15,264 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:15,264 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1293732257, now seen corresponding path program 1 times [2018-01-24 20:58:15,264 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:15,265 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:15,265 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:15,265 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:15,265 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:15,285 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:15,391 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:15,391 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:58:15,391 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:15,391 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 20:58:15,392 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 20:58:15,392 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:58:15,392 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand 9 states. [2018-01-24 20:58:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:15,665 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2018-01-24 20:58:15,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 20:58:15,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-24 20:58:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:15,667 INFO L225 Difference]: With dead ends: 148 [2018-01-24 20:58:15,667 INFO L226 Difference]: Without dead ends: 147 [2018-01-24 20:58:15,667 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2018-01-24 20:58:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-01-24 20:58:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2018-01-24 20:58:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-01-24 20:58:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 153 transitions. [2018-01-24 20:58:15,674 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 153 transitions. Word has length 22 [2018-01-24 20:58:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:15,675 INFO L432 AbstractCegarLoop]: Abstraction has 145 states and 153 transitions. [2018-01-24 20:58:15,675 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 20:58:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 153 transitions. [2018-01-24 20:58:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 20:58:15,675 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:15,675 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:15,676 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1293732256, now seen corresponding path program 1 times [2018-01-24 20:58:15,676 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:15,677 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:15,677 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:15,677 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:15,677 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:15,692 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:15,888 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:15,888 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:58:15,888 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:15,888 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 20:58:15,889 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 20:58:15,889 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:58:15,889 INFO L87 Difference]: Start difference. First operand 145 states and 153 transitions. Second operand 9 states. [2018-01-24 20:58:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:16,787 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2018-01-24 20:58:16,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 20:58:16,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-24 20:58:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:16,788 INFO L225 Difference]: With dead ends: 147 [2018-01-24 20:58:16,788 INFO L226 Difference]: Without dead ends: 146 [2018-01-24 20:58:16,789 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2018-01-24 20:58:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-24 20:58:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2018-01-24 20:58:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-01-24 20:58:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2018-01-24 20:58:16,798 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 22 [2018-01-24 20:58:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:16,798 INFO L432 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2018-01-24 20:58:16,798 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 20:58:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2018-01-24 20:58:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 20:58:16,799 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:16,799 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:16,800 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1249497819, now seen corresponding path program 1 times [2018-01-24 20:58:16,800 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:16,801 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:16,801 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:16,801 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:16,801 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:16,813 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:16,960 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:16,960 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:58:16,960 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:16,961 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 20:58:16,961 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 20:58:16,961 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:58:16,961 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 9 states. [2018-01-24 20:58:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:17,482 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-01-24 20:58:17,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:58:17,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-24 20:58:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:17,484 INFO L225 Difference]: With dead ends: 146 [2018-01-24 20:58:17,484 INFO L226 Difference]: Without dead ends: 145 [2018-01-24 20:58:17,484 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-01-24 20:58:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-01-24 20:58:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2018-01-24 20:58:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-01-24 20:58:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2018-01-24 20:58:17,493 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 22 [2018-01-24 20:58:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:17,493 INFO L432 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2018-01-24 20:58:17,494 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 20:58:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2018-01-24 20:58:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 20:58:17,494 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:17,495 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:17,495 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:17,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1249497820, now seen corresponding path program 1 times [2018-01-24 20:58:17,495 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:17,496 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:17,496 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:17,496 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:17,496 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:17,510 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:17,640 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:58:17,640 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 20:58:17,640 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:58:17,640 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 20:58:17,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 20:58:17,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:58:17,641 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand 10 states. [2018-01-24 20:58:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:58:18,196 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2018-01-24 20:58:18,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 20:58:18,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-01-24 20:58:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:58:18,198 INFO L225 Difference]: With dead ends: 148 [2018-01-24 20:58:18,198 INFO L226 Difference]: Without dead ends: 140 [2018-01-24 20:58:18,198 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2018-01-24 20:58:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-01-24 20:58:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 119. [2018-01-24 20:58:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-24 20:58:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2018-01-24 20:58:18,207 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 22 [2018-01-24 20:58:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:58:18,208 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2018-01-24 20:58:18,208 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 20:58:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2018-01-24 20:58:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-24 20:58:18,209 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:58:18,209 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:58:18,210 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:58:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1046747597, now seen corresponding path program 1 times [2018-01-24 20:58:18,210 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:58:18,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:18,211 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:58:18,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:58:18,211 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:58:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:58:18,232 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:58:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:58:18,615 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:58:18,615 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:58:18,616 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-01-24 20:58:18,618 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [11], [15], [17], [20], [62], [65], [66], [69], [72], [75], [76], [79], [82], [86], [91], [95], [103], [105], [106], [112], [116], [117], [124], [128], [134], [137], [243], [244], [248], [249], [250] [2018-01-24 20:58:18,668 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:58:18,669 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown