java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 21:02:33,709 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 21:02:33,711 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 21:02:33,723 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 21:02:33,723 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 21:02:33,724 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 21:02:33,725 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 21:02:33,727 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 21:02:33,728 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 21:02:33,729 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 21:02:33,730 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 21:02:33,730 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 21:02:33,730 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 21:02:33,732 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 21:02:33,733 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 21:02:33,735 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 21:02:33,737 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 21:02:33,739 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 21:02:33,740 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 21:02:33,741 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 21:02:33,742 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 21:02:33,742 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 21:02:33,742 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 21:02:33,743 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 21:02:33,743 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 21:02:33,744 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 21:02:33,744 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 21:02:33,745 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 21:02:33,745 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 21:02:33,745 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 21:02:33,746 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 21:02:33,746 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 21:02:33,753 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 21:02:33,753 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 21:02:33,753 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 21:02:33,754 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 21:02:33,754 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 21:02:33,754 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 21:02:33,754 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 21:02:33,754 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 21:02:33,754 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 21:02:33,754 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 21:02:33,755 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 21:02:33,755 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 21:02:33,755 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 21:02:33,755 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 21:02:33,755 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 21:02:33,755 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 21:02:33,755 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 21:02:33,755 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 21:02:33,755 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 21:02:33,756 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 21:02:33,756 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 21:02:33,756 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 21:02:33,756 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 21:02:33,756 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 21:02:33,756 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 21:02:33,756 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 21:02:33,756 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 21:02:33,757 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 21:02:33,757 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 21:02:33,757 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 21:02:33,757 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 21:02:33,757 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 21:02:33,757 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 21:02:33,757 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 21:02:33,757 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 21:02:33,758 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 21:02:33,758 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 21:02:33,789 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 21:02:33,800 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 21:02:33,804 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 21:02:33,805 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 21:02:33,806 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 21:02:33,806 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple_true-unreach-call_true-valid-memsafety.i [2018-01-24 21:02:33,969 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 21:02:33,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 21:02:33,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 21:02:33,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 21:02:33,982 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 21:02:33,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 09:02:33" (1/1) ... [2018-01-24 21:02:33,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ee3542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:33, skipping insertion in model container [2018-01-24 21:02:33,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 09:02:33" (1/1) ... [2018-01-24 21:02:34,000 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 21:02:34,042 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 21:02:34,174 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 21:02:34,199 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 21:02:34,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34 WrapperNode [2018-01-24 21:02:34,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 21:02:34,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 21:02:34,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 21:02:34,211 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 21:02:34,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34" (1/1) ... [2018-01-24 21:02:34,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34" (1/1) ... [2018-01-24 21:02:34,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34" (1/1) ... [2018-01-24 21:02:34,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34" (1/1) ... [2018-01-24 21:02:34,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34" (1/1) ... [2018-01-24 21:02:34,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34" (1/1) ... [2018-01-24 21:02:34,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34" (1/1) ... [2018-01-24 21:02:34,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 21:02:34,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 21:02:34,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 21:02:34,257 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 21:02:34,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34" (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 21:02:34,312 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 21:02:34,312 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 21:02:34,312 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 21:02:34,313 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 21:02:34,313 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 21:02:34,313 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 21:02:34,313 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 21:02:34,313 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 21:02:34,314 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 21:02:34,314 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 21:02:34,314 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 21:02:34,314 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 21:02:34,314 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 21:02:34,314 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 21:02:34,314 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 21:02:34,315 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 21:02:34,315 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 21:02:34,833 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 21:02:34,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 09:02:34 BoogieIcfgContainer [2018-01-24 21:02:34,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 21:02:34,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 21:02:34,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 21:02:34,838 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 21:02:34,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 09:02:33" (1/3) ... [2018-01-24 21:02:34,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4b3dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 09:02:34, skipping insertion in model container [2018-01-24 21:02:34,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:02:34" (2/3) ... [2018-01-24 21:02:34,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4b3dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 09:02:34, skipping insertion in model container [2018-01-24 21:02:34,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 09:02:34" (3/3) ... [2018-01-24 21:02:34,841 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple_true-unreach-call_true-valid-memsafety.i [2018-01-24 21:02:34,848 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 21:02:34,855 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 53 error locations. [2018-01-24 21:02:34,895 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 21:02:34,896 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 21:02:34,896 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 21:02:34,896 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 21:02:34,896 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 21:02:34,896 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 21:02:34,896 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 21:02:34,896 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 21:02:34,897 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 21:02:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states. [2018-01-24 21:02:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 21:02:34,923 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:34,924 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:02:34,924 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1174279352, now seen corresponding path program 1 times [2018-01-24 21:02:34,930 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:34,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:34,971 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:34,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:34,972 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:35,014 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:35,085 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 21:02:35,087 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:35,087 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:02:35,087 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:35,090 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:02:35,100 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:02:35,101 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:02:35,103 INFO L87 Difference]: Start difference. First operand 134 states. Second operand 4 states. [2018-01-24 21:02:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:35,391 INFO L93 Difference]: Finished difference Result 250 states and 294 transitions. [2018-01-24 21:02:35,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 21:02:35,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 21:02:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:35,402 INFO L225 Difference]: With dead ends: 250 [2018-01-24 21:02:35,402 INFO L226 Difference]: Without dead ends: 141 [2018-01-24 21:02:35,405 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 21:02:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-01-24 21:02:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2018-01-24 21:02:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-01-24 21:02:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2018-01-24 21:02:35,448 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 8 [2018-01-24 21:02:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:35,448 INFO L432 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2018-01-24 21:02:35,449 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:02:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2018-01-24 21:02:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 21:02:35,449 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:35,449 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:02:35,450 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:35,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1174279351, now seen corresponding path program 1 times [2018-01-24 21:02:35,450 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:35,451 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:35,451 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:35,451 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:35,452 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:35,469 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:35,531 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 21:02:35,531 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:35,531 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:02:35,531 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:35,532 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:02:35,533 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:02:35,533 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:02:35,533 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand 4 states. [2018-01-24 21:02:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:35,815 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2018-01-24 21:02:35,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 21:02:35,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 21:02:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:35,817 INFO L225 Difference]: With dead ends: 129 [2018-01-24 21:02:35,817 INFO L226 Difference]: Without dead ends: 127 [2018-01-24 21:02:35,819 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 21:02:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-01-24 21:02:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-01-24 21:02:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-24 21:02:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 135 transitions. [2018-01-24 21:02:35,830 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 135 transitions. Word has length 8 [2018-01-24 21:02:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:35,831 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 135 transitions. [2018-01-24 21:02:35,831 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:02:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 135 transitions. [2018-01-24 21:02:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 21:02:35,832 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:35,832 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:02:35,832 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:35,832 INFO L82 PathProgramCache]: Analyzing trace with hash -849816279, now seen corresponding path program 1 times [2018-01-24 21:02:35,832 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:35,834 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:35,834 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:35,834 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:35,834 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:35,856 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:35,936 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 21:02:35,936 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:35,936 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:02:35,936 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:35,937 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:02:35,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:02:35,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:02:35,937 INFO L87 Difference]: Start difference. First operand 127 states and 135 transitions. Second operand 4 states. [2018-01-24 21:02:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:36,064 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2018-01-24 21:02:36,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 21:02:36,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-24 21:02:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:36,066 INFO L225 Difference]: With dead ends: 140 [2018-01-24 21:02:36,066 INFO L226 Difference]: Without dead ends: 123 [2018-01-24 21:02:36,066 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 [2018-01-24 21:02:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-24 21:02:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-01-24 21:02:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-24 21:02:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2018-01-24 21:02:36,076 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 15 [2018-01-24 21:02:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:36,076 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2018-01-24 21:02:36,076 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:02:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2018-01-24 21:02:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 21:02:36,077 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:36,077 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:02:36,077 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:36,077 INFO L82 PathProgramCache]: Analyzing trace with hash -849816278, now seen corresponding path program 1 times [2018-01-24 21:02:36,077 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:36,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:36,078 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:36,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:36,078 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:36,096 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:36,236 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 21:02:36,237 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:36,237 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 21:02:36,237 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:36,237 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 21:02:36,237 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 21:02:36,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 21:02:36,238 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 7 states. [2018-01-24 21:02:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:36,579 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2018-01-24 21:02:36,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 21:02:36,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-01-24 21:02:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:36,580 INFO L225 Difference]: With dead ends: 166 [2018-01-24 21:02:36,581 INFO L226 Difference]: Without dead ends: 155 [2018-01-24 21:02:36,581 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-01-24 21:02:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-01-24 21:02:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2018-01-24 21:02:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-01-24 21:02:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2018-01-24 21:02:36,596 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 15 [2018-01-24 21:02:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:36,596 INFO L432 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2018-01-24 21:02:36,596 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 21:02:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2018-01-24 21:02:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 21:02:36,597 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:36,598 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 21:02:36,598 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:36,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1955436370, now seen corresponding path program 1 times [2018-01-24 21:02:36,599 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:36,600 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:36,600 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:36,600 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:36,600 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:36,617 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:36,696 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 21:02:36,696 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:36,696 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 21:02:36,697 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:36,697 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:02:36,697 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:02:36,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:02:36,697 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 6 states. [2018-01-24 21:02:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:36,994 INFO L93 Difference]: Finished difference Result 260 states and 284 transitions. [2018-01-24 21:02:36,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 21:02:36,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 21:02:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:36,996 INFO L225 Difference]: With dead ends: 260 [2018-01-24 21:02:36,996 INFO L226 Difference]: Without dead ends: 259 [2018-01-24 21:02:36,997 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:02:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-01-24 21:02:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 143. [2018-01-24 21:02:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-01-24 21:02:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2018-01-24 21:02:37,010 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 18 [2018-01-24 21:02:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:37,010 INFO L432 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2018-01-24 21:02:37,011 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:02:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2018-01-24 21:02:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 21:02:37,012 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:37,012 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 21:02:37,012 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1955436371, now seen corresponding path program 1 times [2018-01-24 21:02:37,012 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:37,013 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:37,014 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:37,014 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:37,014 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:37,029 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:37,109 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 21:02:37,109 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:37,109 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 21:02:37,109 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:37,110 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:02:37,110 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:02:37,110 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:02:37,110 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand 6 states. [2018-01-24 21:02:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:37,538 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2018-01-24 21:02:37,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 21:02:37,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 21:02:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:37,540 INFO L225 Difference]: With dead ends: 258 [2018-01-24 21:02:37,540 INFO L226 Difference]: Without dead ends: 254 [2018-01-24 21:02:37,541 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-01-24 21:02:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-01-24 21:02:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 133. [2018-01-24 21:02:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-24 21:02:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2018-01-24 21:02:37,549 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 18 [2018-01-24 21:02:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:37,550 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2018-01-24 21:02:37,550 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:02:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2018-01-24 21:02:37,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 21:02:37,551 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:37,551 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] [2018-01-24 21:02:37,551 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:37,551 INFO L82 PathProgramCache]: Analyzing trace with hash 338517523, now seen corresponding path program 1 times [2018-01-24 21:02:37,551 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:37,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:37,552 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:37,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:37,552 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:37,566 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:02:37,670 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:37,670 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 21:02:37,670 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:37,670 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:02:37,671 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:02:37,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:02:37,671 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand 6 states. [2018-01-24 21:02:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:37,817 INFO L93 Difference]: Finished difference Result 268 states and 298 transitions. [2018-01-24 21:02:37,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 21:02:37,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-01-24 21:02:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:37,818 INFO L225 Difference]: With dead ends: 268 [2018-01-24 21:02:37,818 INFO L226 Difference]: Without dead ends: 159 [2018-01-24 21:02:37,819 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:02:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-01-24 21:02:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2018-01-24 21:02:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-01-24 21:02:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2018-01-24 21:02:37,826 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 26 [2018-01-24 21:02:37,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:37,827 INFO L432 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2018-01-24 21:02:37,827 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:02:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2018-01-24 21:02:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 21:02:37,827 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:37,827 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] [2018-01-24 21:02:37,828 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash 244111700, now seen corresponding path program 1 times [2018-01-24 21:02:37,828 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:37,829 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:37,829 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:37,829 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:37,829 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:37,840 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:37,913 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 21:02:37,913 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:37,913 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 21:02:37,913 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:37,914 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:02:37,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:02:37,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:02:37,914 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand 6 states. [2018-01-24 21:02:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:38,257 INFO L93 Difference]: Finished difference Result 228 states and 250 transitions. [2018-01-24 21:02:38,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 21:02:38,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-01-24 21:02:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:38,258 INFO L225 Difference]: With dead ends: 228 [2018-01-24 21:02:38,258 INFO L226 Difference]: Without dead ends: 165 [2018-01-24 21:02:38,259 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:02:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-01-24 21:02:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2018-01-24 21:02:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-01-24 21:02:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2018-01-24 21:02:38,267 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 27 [2018-01-24 21:02:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:38,267 INFO L432 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2018-01-24 21:02:38,267 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:02:38,268 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2018-01-24 21:02:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 21:02:38,269 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:38,269 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:02:38,269 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash 478726098, now seen corresponding path program 1 times [2018-01-24 21:02:38,269 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:38,270 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:38,270 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:38,270 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:38,271 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:38,283 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:38,353 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 21:02:38,354 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:38,354 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 21:02:38,354 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:38,354 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:02:38,355 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:02:38,355 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:02:38,355 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand 6 states. [2018-01-24 21:02:38,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:38,773 INFO L93 Difference]: Finished difference Result 215 states and 235 transitions. [2018-01-24 21:02:38,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 21:02:38,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2018-01-24 21:02:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:38,775 INFO L225 Difference]: With dead ends: 215 [2018-01-24 21:02:38,775 INFO L226 Difference]: Without dead ends: 214 [2018-01-24 21:02:38,775 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:02:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-01-24 21:02:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 154. [2018-01-24 21:02:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-01-24 21:02:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 170 transitions. [2018-01-24 21:02:38,786 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 170 transitions. Word has length 30 [2018-01-24 21:02:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:38,786 INFO L432 AbstractCegarLoop]: Abstraction has 154 states and 170 transitions. [2018-01-24 21:02:38,786 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:02:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 170 transitions. [2018-01-24 21:02:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 21:02:38,787 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:38,787 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:02:38,788 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash 478726099, now seen corresponding path program 1 times [2018-01-24 21:02:38,788 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:38,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:38,789 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:38,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:38,789 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:38,804 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:38,909 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 21:02:38,909 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:02:38,909 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 21:02:38,909 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:02:38,910 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:02:38,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:02:38,910 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:02:38,910 INFO L87 Difference]: Start difference. First operand 154 states and 170 transitions. Second operand 6 states. [2018-01-24 21:02:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:02:39,243 INFO L93 Difference]: Finished difference Result 210 states and 232 transitions. [2018-01-24 21:02:39,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 21:02:39,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2018-01-24 21:02:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:02:39,245 INFO L225 Difference]: With dead ends: 210 [2018-01-24 21:02:39,245 INFO L226 Difference]: Without dead ends: 208 [2018-01-24 21:02:39,246 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:02:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-01-24 21:02:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 152. [2018-01-24 21:02:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-01-24 21:02:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2018-01-24 21:02:39,256 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 168 transitions. Word has length 30 [2018-01-24 21:02:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:02:39,257 INFO L432 AbstractCegarLoop]: Abstraction has 152 states and 168 transitions. [2018-01-24 21:02:39,257 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:02:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 168 transitions. [2018-01-24 21:02:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 21:02:39,258 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:02:39,258 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:02:39,258 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, mainErr52EnsuresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:02:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1148482263, now seen corresponding path program 1 times [2018-01-24 21:02:39,259 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:02:39,259 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:39,260 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:02:39,260 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:02:39,260 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:02:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:02:39,278 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:02:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:02:39,551 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 21:02:39,551 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 21:02:39,552 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-01-24 21:02:39,554 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [14], [17], [19], [20], [21], [24], [27], [28], [31], [37], [41], [43], [44], [46], [49], [57], [61], [66], [70], [76], [79], [244], [245], [249], [250], [251] [2018-01-24 21:02:39,623 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 21:02:39,623 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