java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue_true-unreach-call_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:51:23,370 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:51:23,371 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:51:23,387 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:51:23,387 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:51:23,388 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:51:23,390 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:51:23,391 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:51:23,394 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:51:23,395 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:51:23,396 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:51:23,396 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:51:23,397 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:51:23,398 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:51:23,399 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:51:23,402 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:51:23,404 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:51:23,406 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:51:23,408 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:51:23,409 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:51:23,412 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:51:23,412 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:51:23,412 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:51:23,413 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:51:23,414 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:51:23,416 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:51:23,416 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:51:23,417 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:51:23,417 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:51:23,417 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:51:23,418 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:51:23,418 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 20:51:23,426 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:51:23,427 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:51:23,427 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:51:23,428 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:51:23,428 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:51:23,428 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:51:23,428 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:51:23,428 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:51:23,428 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:51:23,429 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:51:23,429 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:51:23,429 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:51:23,429 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:51:23,429 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:51:23,430 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:51:23,430 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:51:23,430 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:51:23,430 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:51:23,430 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:51:23,430 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:51:23,430 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:51:23,431 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:51:23,431 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:51:23,431 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:51:23,431 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:51:23,431 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:51:23,432 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:51:23,432 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:51:23,432 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:51:23,432 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:51:23,432 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:51:23,432 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:51:23,432 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:51:23,432 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:51:23,433 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:51:23,433 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:51:23,433 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:51:23,467 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:51:23,478 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:51:23,481 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:51:23,482 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:51:23,482 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:51:23,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue_true-unreach-call_false-valid-memtrack.i [2018-01-24 20:51:23,647 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:51:23,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:51:23,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:51:23,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:51:23,658 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:51:23,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:51:23" (1/1) ... [2018-01-24 20:51:23,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6a7c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23, skipping insertion in model container [2018-01-24 20:51:23,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:51:23" (1/1) ... [2018-01-24 20:51:23,677 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:51:23,719 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:51:23,848 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:51:23,873 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:51:23,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23 WrapperNode [2018-01-24 20:51:23,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:51:23,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:51:23,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:51:23,885 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:51:23,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23" (1/1) ... [2018-01-24 20:51:23,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23" (1/1) ... [2018-01-24 20:51:23,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23" (1/1) ... [2018-01-24 20:51:23,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23" (1/1) ... [2018-01-24 20:51:23,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23" (1/1) ... [2018-01-24 20:51:23,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23" (1/1) ... [2018-01-24 20:51:23,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23" (1/1) ... [2018-01-24 20:51:23,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:51:23,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:51:23,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:51:23,932 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:51:23,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:51:23,987 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:51:23,987 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:51:23,987 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:51:23,987 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:51:23,987 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:51:23,988 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:51:23,988 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:51:23,988 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:51:23,988 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:51:23,988 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:51:23,989 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:51:23,989 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:51:23,989 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:51:23,989 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 20:51:23,989 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:51:23,989 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:51:23,990 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:51:24,517 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:51:24,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:51:24 BoogieIcfgContainer [2018-01-24 20:51:24,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:51:24,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:51:24,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:51:24,522 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:51:24,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:51:23" (1/3) ... [2018-01-24 20:51:24,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebf05dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:51:24, skipping insertion in model container [2018-01-24 20:51:24,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:51:23" (2/3) ... [2018-01-24 20:51:24,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebf05dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:51:24, skipping insertion in model container [2018-01-24 20:51:24,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:51:24" (3/3) ... [2018-01-24 20:51:24,526 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue_true-unreach-call_false-valid-memtrack.i [2018-01-24 20:51:24,536 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:51:24,544 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 57 error locations. [2018-01-24 20:51:24,599 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:51:24,599 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:51:24,599 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:51:24,599 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:51:24,600 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:51:24,600 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:51:24,600 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:51:24,600 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:51:24,601 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:51:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states. [2018-01-24 20:51:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:51:24,636 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:24,637 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:24,637 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:24,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2026691577, now seen corresponding path program 1 times [2018-01-24 20:51:24,646 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:24,707 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:24,707 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:24,708 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:24,708 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:24,765 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:24,834 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:24,834 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:51:24,834 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:24,838 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:51:24,854 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:51:24,855 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:51:24,858 INFO L87 Difference]: Start difference. First operand 133 states. Second operand 4 states. [2018-01-24 20:51:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:25,182 INFO L93 Difference]: Finished difference Result 270 states and 310 transitions. [2018-01-24 20:51:25,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:51:25,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:51:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:25,196 INFO L225 Difference]: With dead ends: 270 [2018-01-24 20:51:25,196 INFO L226 Difference]: Without dead ends: 166 [2018-01-24 20:51:25,200 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:51:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-01-24 20:51:25,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2018-01-24 20:51:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-24 20:51:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2018-01-24 20:51:25,238 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 8 [2018-01-24 20:51:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:25,238 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2018-01-24 20:51:25,238 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:51:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2018-01-24 20:51:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:51:25,239 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:25,239 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:25,239 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2026691576, now seen corresponding path program 1 times [2018-01-24 20:51:25,239 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:25,241 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:25,241 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:25,241 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:25,241 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:25,259 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:25,336 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:25,336 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:51:25,336 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:25,338 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:51:25,338 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:51:25,338 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:51:25,339 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 4 states. [2018-01-24 20:51:25,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:25,540 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2018-01-24 20:51:25,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:51:25,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:51:25,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:25,543 INFO L225 Difference]: With dead ends: 154 [2018-01-24 20:51:25,543 INFO L226 Difference]: Without dead ends: 151 [2018-01-24 20:51:25,544 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:51:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-01-24 20:51:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2018-01-24 20:51:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-01-24 20:51:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2018-01-24 20:51:25,557 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 8 [2018-01-24 20:51:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:25,558 INFO L432 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2018-01-24 20:51:25,558 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:51:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2018-01-24 20:51:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 20:51:25,559 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:25,559 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:25,559 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2141337492, now seen corresponding path program 1 times [2018-01-24 20:51:25,560 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:25,561 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:25,561 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:25,561 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:25,561 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:25,588 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:25,662 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:25,662 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:51:25,662 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:25,663 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:51:25,663 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:51:25,663 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:51:25,663 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 4 states. [2018-01-24 20:51:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:25,833 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2018-01-24 20:51:25,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:51:25,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 20:51:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:25,871 INFO L225 Difference]: With dead ends: 141 [2018-01-24 20:51:25,871 INFO L226 Difference]: Without dead ends: 122 [2018-01-24 20:51:25,871 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 20:51:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-01-24 20:51:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2018-01-24 20:51:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-24 20:51:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2018-01-24 20:51:25,884 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 16 [2018-01-24 20:51:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:25,884 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2018-01-24 20:51:25,884 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:51:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2018-01-24 20:51:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 20:51:25,885 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:25,886 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:25,886 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:25,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2141337493, now seen corresponding path program 1 times [2018-01-24 20:51:25,886 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:25,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:25,888 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:25,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:25,888 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:25,910 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:26,011 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:26,011 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:51:26,011 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:26,012 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:51:26,012 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:51:26,012 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:51:26,012 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 7 states. [2018-01-24 20:51:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:26,409 INFO L93 Difference]: Finished difference Result 208 states and 227 transitions. [2018-01-24 20:51:26,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:51:26,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-01-24 20:51:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:26,411 INFO L225 Difference]: With dead ends: 208 [2018-01-24 20:51:26,412 INFO L226 Difference]: Without dead ends: 193 [2018-01-24 20:51:26,412 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:51:26,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-01-24 20:51:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 161. [2018-01-24 20:51:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-01-24 20:51:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2018-01-24 20:51:26,428 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 16 [2018-01-24 20:51:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:26,428 INFO L432 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2018-01-24 20:51:26,428 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:51:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2018-01-24 20:51:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:51:26,429 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:26,429 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:26,430 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:26,430 INFO L82 PathProgramCache]: Analyzing trace with hash 535994936, now seen corresponding path program 1 times [2018-01-24 20:51:26,430 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:26,431 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:26,432 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:26,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:26,432 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:26,449 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:26,543 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:26,543 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:51:26,544 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:26,544 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:51:26,544 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:51:26,544 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:51:26,544 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand 5 states. [2018-01-24 20:51:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:26,821 INFO L93 Difference]: Finished difference Result 282 states and 338 transitions. [2018-01-24 20:51:26,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:51:26,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 20:51:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:26,823 INFO L225 Difference]: With dead ends: 282 [2018-01-24 20:51:26,823 INFO L226 Difference]: Without dead ends: 281 [2018-01-24 20:51:26,824 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:51:26,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-01-24 20:51:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 160. [2018-01-24 20:51:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-01-24 20:51:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2018-01-24 20:51:26,837 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 18 [2018-01-24 20:51:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:26,837 INFO L432 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2018-01-24 20:51:26,838 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:51:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2018-01-24 20:51:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:51:26,838 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:26,839 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:26,839 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash 535994935, now seen corresponding path program 1 times [2018-01-24 20:51:26,839 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:26,840 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:26,840 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:26,840 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:26,841 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:26,852 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:26,884 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:26,884 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:51:26,884 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:26,884 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:51:26,885 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:51:26,885 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:51:26,885 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand 5 states. [2018-01-24 20:51:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:27,113 INFO L93 Difference]: Finished difference Result 274 states and 326 transitions. [2018-01-24 20:51:27,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:51:27,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 20:51:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:27,116 INFO L225 Difference]: With dead ends: 274 [2018-01-24 20:51:27,116 INFO L226 Difference]: Without dead ends: 273 [2018-01-24 20:51:27,117 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:51:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-01-24 20:51:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 159. [2018-01-24 20:51:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-01-24 20:51:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2018-01-24 20:51:27,128 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 18 [2018-01-24 20:51:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:27,128 INFO L432 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2018-01-24 20:51:27,129 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:51:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2018-01-24 20:51:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 20:51:27,130 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:27,130 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:27,130 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash -598321662, now seen corresponding path program 1 times [2018-01-24 20:51:27,130 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:27,131 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:27,132 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:27,132 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:27,132 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:27,144 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:27,167 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:27,167 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:51:27,167 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:27,168 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:51:27,168 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:51:27,168 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:51:27,168 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand 4 states. [2018-01-24 20:51:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:27,314 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-01-24 20:51:27,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:51:27,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-01-24 20:51:27,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:27,316 INFO L225 Difference]: With dead ends: 175 [2018-01-24 20:51:27,316 INFO L226 Difference]: Without dead ends: 174 [2018-01-24 20:51:27,316 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:51:27,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-01-24 20:51:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 158. [2018-01-24 20:51:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-24 20:51:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2018-01-24 20:51:27,326 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 19 [2018-01-24 20:51:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:27,326 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2018-01-24 20:51:27,326 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:51:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2018-01-24 20:51:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 20:51:27,326 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:27,327 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:27,327 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:27,327 INFO L82 PathProgramCache]: Analyzing trace with hash -598321661, now seen corresponding path program 1 times [2018-01-24 20:51:27,327 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:27,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:27,328 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:27,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:27,328 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:27,339 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:27,391 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:27,391 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:51:27,391 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:27,391 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:51:27,392 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:51:27,392 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:51:27,392 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand 4 states. [2018-01-24 20:51:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:27,520 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2018-01-24 20:51:27,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:51:27,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-01-24 20:51:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:27,521 INFO L225 Difference]: With dead ends: 177 [2018-01-24 20:51:27,521 INFO L226 Difference]: Without dead ends: 174 [2018-01-24 20:51:27,521 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:51:27,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-01-24 20:51:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2018-01-24 20:51:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-01-24 20:51:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2018-01-24 20:51:27,529 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 19 [2018-01-24 20:51:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:27,530 INFO L432 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2018-01-24 20:51:27,530 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:51:27,530 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2018-01-24 20:51:27,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 20:51:27,531 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:27,531 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:27,531 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:27,531 INFO L82 PathProgramCache]: Analyzing trace with hash -992339015, now seen corresponding path program 1 times [2018-01-24 20:51:27,531 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:27,532 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:27,532 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:27,532 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:27,532 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:27,542 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:27,643 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:27,643 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:51:27,643 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:27,643 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 20:51:27,643 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 20:51:27,644 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:51:27,644 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand 9 states. [2018-01-24 20:51:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:28,131 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2018-01-24 20:51:28,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 20:51:28,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-24 20:51:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:28,135 INFO L225 Difference]: With dead ends: 161 [2018-01-24 20:51:28,135 INFO L226 Difference]: Without dead ends: 160 [2018-01-24 20:51:28,136 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2018-01-24 20:51:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-24 20:51:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2018-01-24 20:51:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-01-24 20:51:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2018-01-24 20:51:28,153 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 22 [2018-01-24 20:51:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:28,153 INFO L432 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2018-01-24 20:51:28,154 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 20:51:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2018-01-24 20:51:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 20:51:28,155 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:28,155 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:28,155 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:28,155 INFO L82 PathProgramCache]: Analyzing trace with hash -992339014, now seen corresponding path program 1 times [2018-01-24 20:51:28,156 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:28,156 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:28,157 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:28,157 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:28,157 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:28,174 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:28,409 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:28,409 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 20:51:28,409 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:28,409 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 20:51:28,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 20:51:28,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:51:28,410 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand 10 states. [2018-01-24 20:51:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:29,185 INFO L93 Difference]: Finished difference Result 165 states and 190 transitions. [2018-01-24 20:51:29,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 20:51:29,186 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-01-24 20:51:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:29,187 INFO L225 Difference]: With dead ends: 165 [2018-01-24 20:51:29,187 INFO L226 Difference]: Without dead ends: 160 [2018-01-24 20:51:29,188 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2018-01-24 20:51:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-24 20:51:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2018-01-24 20:51:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-01-24 20:51:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2018-01-24 20:51:29,199 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 22 [2018-01-24 20:51:29,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:29,200 INFO L432 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2018-01-24 20:51:29,200 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 20:51:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2018-01-24 20:51:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 20:51:29,201 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:29,201 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] [2018-01-24 20:51:29,202 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:29,202 INFO L82 PathProgramCache]: Analyzing trace with hash 325408366, now seen corresponding path program 1 times [2018-01-24 20:51:29,202 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:29,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:29,203 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:29,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:29,203 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:29,214 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:29,309 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 20:51:29,309 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:29,310 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:51:29,310 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:29,310 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:51:29,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:51:29,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:51:29,310 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand 5 states. [2018-01-24 20:51:29,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:29,621 INFO L93 Difference]: Finished difference Result 241 states and 282 transitions. [2018-01-24 20:51:29,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:51:29,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-01-24 20:51:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:29,623 INFO L225 Difference]: With dead ends: 241 [2018-01-24 20:51:29,623 INFO L226 Difference]: Without dead ends: 157 [2018-01-24 20:51:29,623 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:51:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-01-24 20:51:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2018-01-24 20:51:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-01-24 20:51:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2018-01-24 20:51:29,631 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 24 [2018-01-24 20:51:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:29,631 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2018-01-24 20:51:29,631 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:51:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2018-01-24 20:51:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 20:51:29,632 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:29,632 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] [2018-01-24 20:51:29,632 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1282351166, now seen corresponding path program 1 times [2018-01-24 20:51:29,633 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:29,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:29,633 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:29,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:29,634 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:29,643 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:29,773 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:29,773 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:51:29,773 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:29,773 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:51:29,773 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:51:29,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:51:29,774 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand 5 states. [2018-01-24 20:51:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:30,036 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2018-01-24 20:51:30,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:51:30,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-24 20:51:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:30,037 INFO L225 Difference]: With dead ends: 185 [2018-01-24 20:51:30,037 INFO L226 Difference]: Without dead ends: 180 [2018-01-24 20:51:30,038 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:51:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-01-24 20:51:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 126. [2018-01-24 20:51:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-01-24 20:51:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2018-01-24 20:51:30,048 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 25 [2018-01-24 20:51:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:30,048 INFO L432 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2018-01-24 20:51:30,048 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:51:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2018-01-24 20:51:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 20:51:30,049 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:30,050 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 20:51:30,050 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1416942161, now seen corresponding path program 1 times [2018-01-24 20:51:30,050 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:30,051 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:30,051 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:30,051 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:30,051 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:30,063 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:30,139 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:51:30,139 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:51:30,140 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:51:30,140 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:51:30,140 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:51:30,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:51:30,141 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand 6 states. [2018-01-24 20:51:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:51:30,412 INFO L93 Difference]: Finished difference Result 248 states and 276 transitions. [2018-01-24 20:51:30,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:51:30,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-01-24 20:51:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:51:30,413 INFO L225 Difference]: With dead ends: 248 [2018-01-24 20:51:30,414 INFO L226 Difference]: Without dead ends: 193 [2018-01-24 20:51:30,414 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:51:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-01-24 20:51:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 139. [2018-01-24 20:51:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-01-24 20:51:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2018-01-24 20:51:30,424 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 27 [2018-01-24 20:51:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:51:30,424 INFO L432 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2018-01-24 20:51:30,424 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:51:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2018-01-24 20:51:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:51:30,425 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:51:30,426 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:51:30,426 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr56EnsuresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 20:51:30,426 INFO L82 PathProgramCache]: Analyzing trace with hash -564778548, now seen corresponding path program 1 times [2018-01-24 20:51:30,426 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:51:30,427 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:30,427 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:51:30,427 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:51:30,428 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:51:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:51:30,443 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:51:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:51:30,608 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:51:30,608 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:51:30,610 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-01-24 20:51:30,612 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [11], [15], [17], [20], [47], [50], [51], [52], [53], [56], [59], [62], [120], [124], [126], [128], [133], [134], [137], [213], [214], [218], [219], [220] [2018-01-24 20:51:30,661 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:51:30,661 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