java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1_false-unreach-call_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 00:28:58,701 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 00:28:58,704 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 00:28:58,720 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 00:28:58,720 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 00:28:58,721 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 00:28:58,723 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 00:28:58,724 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 00:28:58,727 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 00:28:58,728 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 00:28:58,729 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 00:28:58,729 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 00:28:58,730 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 00:28:58,731 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 00:28:58,732 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 00:28:58,735 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 00:28:58,737 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 00:28:58,740 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 00:28:58,741 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 00:28:58,743 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 00:28:58,745 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 00:28:58,745 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 00:28:58,746 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 00:28:58,747 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 00:28:58,748 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 00:28:58,749 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 00:28:58,749 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 00:28:58,750 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 00:28:58,751 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 00:28:58,751 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 00:28:58,751 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 00:28:58,752 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-25 00:28:58,761 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 00:28:58,761 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 00:28:58,762 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 00:28:58,762 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 00:28:58,762 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 00:28:58,762 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 00:28:58,762 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 00:28:58,762 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 00:28:58,763 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 00:28:58,763 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 00:28:58,763 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 00:28:58,763 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 00:28:58,763 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 00:28:58,764 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 00:28:58,764 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 00:28:58,764 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 00:28:58,764 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 00:28:58,764 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 00:28:58,764 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 00:28:58,764 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 00:28:58,765 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 00:28:58,765 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 00:28:58,765 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 00:28:58,765 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 00:28:58,765 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 00:28:58,766 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 00:28:58,766 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 00:28:58,766 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 00:28:58,766 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 00:28:58,766 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 00:28:58,766 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 00:28:58,766 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 00:28:58,767 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 00:28:58,767 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 00:28:58,768 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 00:28:58,768 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 00:28:58,802 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 00:28:58,815 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 00:28:58,820 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 00:28:58,821 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 00:28:58,821 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 00:28:58,822 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1_false-unreach-call_false-valid-deref.i [2018-01-25 00:28:58,991 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 00:28:58,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 00:28:58,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 00:28:58,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 00:28:59,003 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 00:28:59,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 12:28:58" (1/1) ... [2018-01-25 00:28:59,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e41757a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59, skipping insertion in model container [2018-01-25 00:28:59,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 12:28:58" (1/1) ... [2018-01-25 00:28:59,022 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 00:28:59,066 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 00:28:59,198 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 00:28:59,219 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 00:28:59,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59 WrapperNode [2018-01-25 00:28:59,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 00:28:59,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 00:28:59,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 00:28:59,229 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 00:28:59,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59" (1/1) ... [2018-01-25 00:28:59,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59" (1/1) ... [2018-01-25 00:28:59,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59" (1/1) ... [2018-01-25 00:28:59,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59" (1/1) ... [2018-01-25 00:28:59,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59" (1/1) ... [2018-01-25 00:28:59,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59" (1/1) ... [2018-01-25 00:28:59,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59" (1/1) ... [2018-01-25 00:28:59,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 00:28:59,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 00:28:59,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 00:28:59,269 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 00:28:59,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59" (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 [2018-01-25 00:28:59,326 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 00:28:59,326 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 00:28:59,326 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 00:28:59,326 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-25 00:28:59,327 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-25 00:28:59,327 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 00:28:59,327 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 00:28:59,327 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 00:28:59,327 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 00:28:59,327 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 00:28:59,327 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-25 00:28:59,327 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 00:28:59,327 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 00:28:59,328 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-25 00:28:59,328 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 00:28:59,328 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 00:28:59,328 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 00:28:59,831 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 00:28:59,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 12:28:59 BoogieIcfgContainer [2018-01-25 00:28:59,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 00:28:59,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 00:28:59,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 00:28:59,836 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 00:28:59,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 12:28:58" (1/3) ... [2018-01-25 00:28:59,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3fde84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 12:28:59, skipping insertion in model container [2018-01-25 00:28:59,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:28:59" (2/3) ... [2018-01-25 00:28:59,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3fde84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 12:28:59, skipping insertion in model container [2018-01-25 00:28:59,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 12:28:59" (3/3) ... [2018-01-25 00:28:59,841 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1_false-unreach-call_false-valid-deref.i [2018-01-25 00:28:59,851 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 00:28:59,860 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 49 error locations. [2018-01-25 00:28:59,916 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 00:28:59,916 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 00:28:59,916 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 00:28:59,917 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 00:28:59,917 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 00:28:59,917 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 00:28:59,917 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 00:28:59,917 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 00:28:59,918 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 00:28:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states. [2018-01-25 00:28:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-25 00:28:59,950 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:28:59,951 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:28:59,952 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:28:59,958 INFO L82 PathProgramCache]: Analyzing trace with hash -610536619, now seen corresponding path program 1 times [2018-01-25 00:28:59,961 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:00,033 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:00,033 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:00,033 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:00,033 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:00,088 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:00,164 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:00,165 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 00:29:00,165 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:00,169 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 00:29:00,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 00:29:00,187 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 00:29:00,190 INFO L87 Difference]: Start difference. First operand 118 states. Second operand 4 states. [2018-01-25 00:29:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:00,483 INFO L93 Difference]: Finished difference Result 201 states and 244 transitions. [2018-01-25 00:29:00,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 00:29:00,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-25 00:29:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:00,494 INFO L225 Difference]: With dead ends: 201 [2018-01-25 00:29:00,494 INFO L226 Difference]: Without dead ends: 127 [2018-01-25 00:29:00,498 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 [2018-01-25 00:29:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-01-25 00:29:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2018-01-25 00:29:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-25 00:29:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2018-01-25 00:29:00,537 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 8 [2018-01-25 00:29:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:00,537 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2018-01-25 00:29:00,537 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 00:29:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2018-01-25 00:29:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-25 00:29:00,538 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:00,538 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:00,538 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:00,538 INFO L82 PathProgramCache]: Analyzing trace with hash -610536618, now seen corresponding path program 1 times [2018-01-25 00:29:00,538 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:00,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:00,540 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:00,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:00,540 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:00,554 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:00,638 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:00,638 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 00:29:00,638 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:00,640 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 00:29:00,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 00:29:00,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 00:29:00,641 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand 4 states. [2018-01-25 00:29:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:00,820 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2018-01-25 00:29:00,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 00:29:00,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-25 00:29:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:00,823 INFO L225 Difference]: With dead ends: 132 [2018-01-25 00:29:00,823 INFO L226 Difference]: Without dead ends: 125 [2018-01-25 00:29:00,824 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 [2018-01-25 00:29:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-01-25 00:29:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2018-01-25 00:29:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-01-25 00:29:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-01-25 00:29:00,835 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 8 [2018-01-25 00:29:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:00,836 INFO L432 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-01-25 00:29:00,836 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 00:29:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-01-25 00:29:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-25 00:29:00,837 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:00,837 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:00,837 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash -631958404, now seen corresponding path program 1 times [2018-01-25 00:29:00,837 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:00,839 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:00,839 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:00,840 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:00,840 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:00,862 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:00,943 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:00,943 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 00:29:00,943 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:00,944 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 00:29:00,944 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 00:29:00,944 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 00:29:00,944 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 4 states. [2018-01-25 00:29:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:01,091 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2018-01-25 00:29:01,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 00:29:01,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-25 00:29:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:01,092 INFO L225 Difference]: With dead ends: 140 [2018-01-25 00:29:01,093 INFO L226 Difference]: Without dead ends: 127 [2018-01-25 00:29:01,093 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 00:29:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-01-25 00:29:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2018-01-25 00:29:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-01-25 00:29:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2018-01-25 00:29:01,101 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 15 [2018-01-25 00:29:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:01,101 INFO L432 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2018-01-25 00:29:01,101 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 00:29:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2018-01-25 00:29:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-25 00:29:01,101 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:01,102 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:01,102 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash -631958403, now seen corresponding path program 1 times [2018-01-25 00:29:01,102 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:01,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:01,103 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:01,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:01,103 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:01,122 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:01,213 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:01,213 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 00:29:01,213 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:01,214 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 00:29:01,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 00:29:01,214 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:29:01,214 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 7 states. [2018-01-25 00:29:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:01,521 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2018-01-25 00:29:01,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 00:29:01,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-01-25 00:29:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:01,524 INFO L225 Difference]: With dead ends: 153 [2018-01-25 00:29:01,524 INFO L226 Difference]: Without dead ends: 146 [2018-01-25 00:29:01,525 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-01-25 00:29:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-25 00:29:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 123. [2018-01-25 00:29:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-01-25 00:29:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2018-01-25 00:29:01,536 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 15 [2018-01-25 00:29:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:01,536 INFO L432 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2018-01-25 00:29:01,536 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 00:29:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2018-01-25 00:29:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-25 00:29:01,537 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:01,537 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:01,538 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1831161057, now seen corresponding path program 1 times [2018-01-25 00:29:01,539 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:01,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:01,540 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:01,541 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:01,541 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:01,556 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:01,628 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:01,628 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:29:01,628 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:01,628 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 00:29:01,629 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 00:29:01,629 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 00:29:01,629 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 6 states. [2018-01-25 00:29:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:01,879 INFO L93 Difference]: Finished difference Result 202 states and 219 transitions. [2018-01-25 00:29:01,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 00:29:01,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-25 00:29:01,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:01,912 INFO L225 Difference]: With dead ends: 202 [2018-01-25 00:29:01,912 INFO L226 Difference]: Without dead ends: 201 [2018-01-25 00:29:01,912 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-25 00:29:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-01-25 00:29:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 122. [2018-01-25 00:29:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-25 00:29:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2018-01-25 00:29:01,922 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 18 [2018-01-25 00:29:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:01,922 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2018-01-25 00:29:01,923 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 00:29:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2018-01-25 00:29:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-25 00:29:01,923 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:01,924 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:01,924 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:01,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1831161056, now seen corresponding path program 1 times [2018-01-25 00:29:01,924 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:01,925 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:01,925 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:01,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:01,926 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:01,937 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:02,027 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:02,027 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:29:02,027 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:02,028 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 00:29:02,028 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 00:29:02,028 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 00:29:02,028 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand 6 states. [2018-01-25 00:29:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:02,251 INFO L93 Difference]: Finished difference Result 210 states and 230 transitions. [2018-01-25 00:29:02,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 00:29:02,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-25 00:29:02,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:02,252 INFO L225 Difference]: With dead ends: 210 [2018-01-25 00:29:02,252 INFO L226 Difference]: Without dead ends: 203 [2018-01-25 00:29:02,253 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-01-25 00:29:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-01-25 00:29:02,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 117. [2018-01-25 00:29:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-01-25 00:29:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2018-01-25 00:29:02,262 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 18 [2018-01-25 00:29:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:02,262 INFO L432 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2018-01-25 00:29:02,262 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 00:29:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2018-01-25 00:29:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-25 00:29:02,264 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:02,264 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, 1, 1, 1, 1] [2018-01-25 00:29:02,264 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:02,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1015590286, now seen corresponding path program 1 times [2018-01-25 00:29:02,264 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:02,266 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:02,266 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:02,266 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:02,266 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:02,281 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:02,335 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:02,335 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:29:02,335 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:02,335 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 00:29:02,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 00:29:02,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 00:29:02,339 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand 6 states. [2018-01-25 00:29:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:02,586 INFO L93 Difference]: Finished difference Result 215 states and 235 transitions. [2018-01-25 00:29:02,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 00:29:02,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-01-25 00:29:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:02,588 INFO L225 Difference]: With dead ends: 215 [2018-01-25 00:29:02,588 INFO L226 Difference]: Without dead ends: 214 [2018-01-25 00:29:02,588 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-25 00:29:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-01-25 00:29:02,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 116. [2018-01-25 00:29:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-01-25 00:29:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2018-01-25 00:29:02,594 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 26 [2018-01-25 00:29:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:02,595 INFO L432 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2018-01-25 00:29:02,595 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 00:29:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2018-01-25 00:29:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-25 00:29:02,596 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:02,596 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:02,596 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:02,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1015590287, now seen corresponding path program 1 times [2018-01-25 00:29:02,597 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:02,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:02,598 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:02,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:02,599 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:02,617 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:02,687 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:02,687 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:29:02,688 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:02,688 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 00:29:02,688 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 00:29:02,688 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 00:29:02,689 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand 6 states. [2018-01-25 00:29:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:02,954 INFO L93 Difference]: Finished difference Result 209 states and 230 transitions. [2018-01-25 00:29:02,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 00:29:02,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-01-25 00:29:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:02,956 INFO L225 Difference]: With dead ends: 209 [2018-01-25 00:29:02,956 INFO L226 Difference]: Without dead ends: 205 [2018-01-25 00:29:02,956 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-01-25 00:29:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-01-25 00:29:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 106. [2018-01-25 00:29:02,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-01-25 00:29:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2018-01-25 00:29:02,965 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 26 [2018-01-25 00:29:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:02,965 INFO L432 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2018-01-25 00:29:02,965 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 00:29:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2018-01-25 00:29:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-25 00:29:02,969 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:02,969 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:02,969 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:02,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1810127631, now seen corresponding path program 1 times [2018-01-25 00:29:02,970 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:02,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:02,972 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:02,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:02,973 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:02,987 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:03,059 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:03,059 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:29:03,059 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:03,060 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 00:29:03,060 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 00:29:03,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 00:29:03,060 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 5 states. [2018-01-25 00:29:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:03,190 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2018-01-25 00:29:03,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 00:29:03,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-25 00:29:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:03,192 INFO L225 Difference]: With dead ends: 157 [2018-01-25 00:29:03,192 INFO L226 Difference]: Without dead ends: 121 [2018-01-25 00:29:03,193 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:29:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-01-25 00:29:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2018-01-25 00:29:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-01-25 00:29:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2018-01-25 00:29:03,202 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 27 [2018-01-25 00:29:03,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:03,202 INFO L432 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2018-01-25 00:29:03,202 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 00:29:03,202 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2018-01-25 00:29:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-25 00:29:03,203 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:03,206 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:03,206 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash 292737253, now seen corresponding path program 1 times [2018-01-25 00:29:03,206 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:03,207 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:03,208 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:03,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:03,208 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:03,218 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:03,371 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:03,371 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:29:03,371 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:03,371 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 00:29:03,371 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 00:29:03,372 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 00:29:03,372 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 5 states. [2018-01-25 00:29:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:03,498 INFO L93 Difference]: Finished difference Result 175 states and 189 transitions. [2018-01-25 00:29:03,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 00:29:03,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-25 00:29:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:03,499 INFO L225 Difference]: With dead ends: 175 [2018-01-25 00:29:03,499 INFO L226 Difference]: Without dead ends: 114 [2018-01-25 00:29:03,500 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-25 00:29:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-25 00:29:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2018-01-25 00:29:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-01-25 00:29:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2018-01-25 00:29:03,505 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 28 [2018-01-25 00:29:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:03,505 INFO L432 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2018-01-25 00:29:03,505 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 00:29:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2018-01-25 00:29:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-25 00:29:03,507 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:03,507 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:03,507 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:03,508 INFO L82 PathProgramCache]: Analyzing trace with hash -458774714, now seen corresponding path program 1 times [2018-01-25 00:29:03,508 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:03,509 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:03,510 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:03,510 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:03,510 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:03,521 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:03,682 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:29:03,683 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:29:03,683 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:29:03,683 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 00:29:03,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 00:29:03,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 00:29:03,684 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand 5 states. [2018-01-25 00:29:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:29:03,817 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2018-01-25 00:29:03,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 00:29:03,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-01-25 00:29:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:29:03,818 INFO L225 Difference]: With dead ends: 187 [2018-01-25 00:29:03,818 INFO L226 Difference]: Without dead ends: 110 [2018-01-25 00:29:03,819 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:29:03,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-25 00:29:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-01-25 00:29:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-01-25 00:29:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2018-01-25 00:29:03,825 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 34 [2018-01-25 00:29:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:29:03,825 INFO L432 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2018-01-25 00:29:03,825 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 00:29:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2018-01-25 00:29:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-25 00:29:03,827 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:29:03,827 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:29:03,827 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr48EnsuresViolation, mainErr40RequiresViolation]=== [2018-01-25 00:29:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash -799027183, now seen corresponding path program 1 times [2018-01-25 00:29:03,828 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:29:03,829 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:03,829 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:29:03,829 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:29:03,829 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:29:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:29:03,844 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:29:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:29:04,144 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 00:29:04,144 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 00:29:04,145 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-01-25 00:29:04,146 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [14], [17], [19], [20], [21], [24], [27], [28], [31], [34], [35], [61], [65], [70], [74], [82], [83], [90], [94], [102], [108], [109], [110], [124], [128], [129], [136], [140], [146], [149], [199], [200], [204], [205], [206] [2018-01-25 00:29:04,197 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 00:29:04,197 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