java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-queue_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 21:00:23,566 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 21:00:23,568 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 21:00:23,584 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 21:00:23,584 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 21:00:23,585 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 21:00:23,586 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 21:00:23,588 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 21:00:23,590 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 21:00:23,591 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 21:00:23,592 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 21:00:23,592 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 21:00:23,593 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 21:00:23,594 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 21:00:23,595 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 21:00:23,598 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 21:00:23,600 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 21:00:23,602 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 21:00:23,603 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 21:00:23,605 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 21:00:23,607 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 21:00:23,608 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 21:00:23,608 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 21:00:23,609 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 21:00:23,610 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 21:00:23,611 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 21:00:23,611 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 21:00:23,612 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 21:00:23,612 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 21:00:23,612 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 21:00:23,613 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 21:00:23,613 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 21:00:23,623 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 21:00:23,623 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 21:00:23,623 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 21:00:23,624 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 21:00:23,624 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 21:00:23,624 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 21:00:23,624 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 21:00:23,624 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 21:00:23,624 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 21:00:23,625 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 21:00:23,625 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 21:00:23,625 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 21:00:23,625 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 21:00:23,625 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 21:00:23,626 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 21:00:23,626 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 21:00:23,626 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 21:00:23,626 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 21:00:23,626 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 21:00:23,626 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 21:00:23,626 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 21:00:23,627 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 21:00:23,627 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 21:00:23,627 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 21:00:23,627 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 21:00:23,627 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 21:00:23,628 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 21:00:23,628 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 21:00:23,628 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 21:00:23,628 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 21:00:23,628 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 21:00:23,628 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 21:00:23,628 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 21:00:23,629 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 21:00:23,629 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 21:00:23,629 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 21:00:23,629 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 21:00:23,663 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 21:00:23,676 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 21:00:23,680 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 21:00:23,681 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 21:00:23,681 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 21:00:23,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-queue_true-unreach-call_true-valid-memsafety.i [2018-01-24 21:00:23,832 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 21:00:23,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 21:00:23,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 21:00:23,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 21:00:23,847 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 21:00:23,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 09:00:23" (1/1) ... [2018-01-24 21:00:23,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a45686f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:23, skipping insertion in model container [2018-01-24 21:00:23,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 09:00:23" (1/1) ... [2018-01-24 21:00:23,865 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 21:00:23,908 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 21:00:24,029 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 21:00:24,051 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 21:00:24,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24 WrapperNode [2018-01-24 21:00:24,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 21:00:24,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 21:00:24,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 21:00:24,064 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 21:00:24,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24" (1/1) ... [2018-01-24 21:00:24,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24" (1/1) ... [2018-01-24 21:00:24,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24" (1/1) ... [2018-01-24 21:00:24,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24" (1/1) ... [2018-01-24 21:00:24,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24" (1/1) ... [2018-01-24 21:00:24,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24" (1/1) ... [2018-01-24 21:00:24,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24" (1/1) ... [2018-01-24 21:00:24,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 21:00:24,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 21:00:24,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 21:00:24,109 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 21:00:24,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 21:00:24,167 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 21:00:24,167 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 21:00:24,167 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 21:00:24,168 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 21:00:24,168 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 21:00:24,168 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 21:00:24,168 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 21:00:24,168 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 21:00:24,168 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 21:00:24,169 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 21:00:24,169 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 21:00:24,169 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 21:00:24,169 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 21:00:24,169 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 21:00:24,169 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 21:00:24,169 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 21:00:24,169 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 21:00:24,720 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 21:00:24,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 09:00:24 BoogieIcfgContainer [2018-01-24 21:00:24,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 21:00:24,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 21:00:24,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 21:00:24,725 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 21:00:24,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 09:00:23" (1/3) ... [2018-01-24 21:00:24,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a346697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 09:00:24, skipping insertion in model container [2018-01-24 21:00:24,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 09:00:24" (2/3) ... [2018-01-24 21:00:24,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a346697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 09:00:24, skipping insertion in model container [2018-01-24 21:00:24,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 09:00:24" (3/3) ... [2018-01-24 21:00:24,729 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-queue_true-unreach-call_true-valid-memsafety.i [2018-01-24 21:00:24,736 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 21:00:24,742 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 55 error locations. [2018-01-24 21:00:24,783 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 21:00:24,783 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 21:00:24,783 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 21:00:24,784 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 21:00:24,784 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 21:00:24,784 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 21:00:24,784 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 21:00:24,784 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 21:00:24,785 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 21:00:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states. [2018-01-24 21:00:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 21:00:24,815 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:24,816 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:24,816 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:24,820 INFO L82 PathProgramCache]: Analyzing trace with hash 865717012, now seen corresponding path program 1 times [2018-01-24 21:00:24,822 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:24,864 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:24,864 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:24,865 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:24,865 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:24,913 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:24,993 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:24,994 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:00:24,994 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:24,997 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:00:25,088 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:00:25,089 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:00:25,092 INFO L87 Difference]: Start difference. First operand 162 states. Second operand 4 states. [2018-01-24 21:00:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:25,386 INFO L93 Difference]: Finished difference Result 314 states and 435 transitions. [2018-01-24 21:00:25,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 21:00:25,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 21:00:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:25,398 INFO L225 Difference]: With dead ends: 314 [2018-01-24 21:00:25,399 INFO L226 Difference]: Without dead ends: 160 [2018-01-24 21:00:25,404 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-24 21:00:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2018-01-24 21:00:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-01-24 21:00:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2018-01-24 21:00:25,444 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 8 [2018-01-24 21:00:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:25,445 INFO L432 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2018-01-24 21:00:25,445 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:00:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2018-01-24 21:00:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 21:00:25,446 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:25,446 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:25,446 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:25,446 INFO L82 PathProgramCache]: Analyzing trace with hash 865717013, now seen corresponding path program 1 times [2018-01-24 21:00:25,446 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:25,447 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,448 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:25,448 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,448 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:25,466 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:25,548 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:25,548 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:00:25,548 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:25,550 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:00:25,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:00:25,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:00:25,550 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand 4 states. [2018-01-24 21:00:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:25,718 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2018-01-24 21:00:25,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 21:00:25,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 21:00:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:25,721 INFO L225 Difference]: With dead ends: 157 [2018-01-24 21:00:25,721 INFO L226 Difference]: Without dead ends: 146 [2018-01-24 21:00:25,722 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-24 21:00:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2018-01-24 21:00:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-01-24 21:00:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2018-01-24 21:00:25,735 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 8 [2018-01-24 21:00:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:25,735 INFO L432 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2018-01-24 21:00:25,736 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:00:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2018-01-24 21:00:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 21:00:25,736 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:25,737 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:25,737 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1721247779, now seen corresponding path program 1 times [2018-01-24 21:00:25,737 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:25,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,740 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:25,740 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,740 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:25,762 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:25,859 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:25,859 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:00:25,859 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:25,860 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:00:25,860 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:00:25,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:00:25,860 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand 4 states. [2018-01-24 21:00:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:25,963 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2018-01-24 21:00:25,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 21:00:25,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-24 21:00:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:25,965 INFO L225 Difference]: With dead ends: 154 [2018-01-24 21:00:25,965 INFO L226 Difference]: Without dead ends: 147 [2018-01-24 21:00:25,966 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-01-24 21:00:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2018-01-24 21:00:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-01-24 21:00:25,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 155 transitions. [2018-01-24 21:00:25,978 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 155 transitions. Word has length 15 [2018-01-24 21:00:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:25,979 INFO L432 AbstractCegarLoop]: Abstraction has 142 states and 155 transitions. [2018-01-24 21:00:25,979 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:00:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 155 transitions. [2018-01-24 21:00:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 21:00:25,980 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:25,980 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:25,980 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:25,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1721247778, now seen corresponding path program 1 times [2018-01-24 21:00:25,981 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:25,982 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,982 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:25,982 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:25,982 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:26,003 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:26,125 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:26,125 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 21:00:26,125 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:26,126 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 21:00:26,126 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 21:00:26,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 21:00:26,126 INFO L87 Difference]: Start difference. First operand 142 states and 155 transitions. Second operand 7 states. [2018-01-24 21:00:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:26,515 INFO L93 Difference]: Finished difference Result 226 states and 241 transitions. [2018-01-24 21:00:26,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 21:00:26,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-01-24 21:00:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:26,518 INFO L225 Difference]: With dead ends: 226 [2018-01-24 21:00:26,518 INFO L226 Difference]: Without dead ends: 223 [2018-01-24 21:00:26,518 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-01-24 21:00:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-01-24 21:00:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 148. [2018-01-24 21:00:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-01-24 21:00:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 161 transitions. [2018-01-24 21:00:26,533 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 161 transitions. Word has length 15 [2018-01-24 21:00:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:26,534 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 161 transitions. [2018-01-24 21:00:26,534 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 21:00:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 161 transitions. [2018-01-24 21:00:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 21:00:26,535 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:26,535 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:26,535 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash -78043106, now seen corresponding path program 1 times [2018-01-24 21:00:26,536 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:26,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:26,537 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:26,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:26,537 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:26,553 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:26,598 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:26,598 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 21:00:26,598 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:26,598 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:00:26,599 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:00:26,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:00:26,599 INFO L87 Difference]: Start difference. First operand 148 states and 161 transitions. Second operand 6 states. [2018-01-24 21:00:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:26,825 INFO L93 Difference]: Finished difference Result 243 states and 261 transitions. [2018-01-24 21:00:26,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 21:00:26,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 21:00:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:26,827 INFO L225 Difference]: With dead ends: 243 [2018-01-24 21:00:26,827 INFO L226 Difference]: Without dead ends: 242 [2018-01-24 21:00:26,827 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:00:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-01-24 21:00:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 147. [2018-01-24 21:00:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-01-24 21:00:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2018-01-24 21:00:26,837 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 18 [2018-01-24 21:00:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:26,838 INFO L432 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2018-01-24 21:00:26,838 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:00:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2018-01-24 21:00:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 21:00:26,839 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:26,839 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 21:00:26,839 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash -78043105, now seen corresponding path program 1 times [2018-01-24 21:00:26,840 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:26,840 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:26,841 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:26,841 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:26,841 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:26,853 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:26,932 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:26,932 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 21:00:26,932 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:26,932 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:00:26,933 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:00:26,933 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:00:26,933 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand 6 states. [2018-01-24 21:00:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:27,239 INFO L93 Difference]: Finished difference Result 250 states and 271 transitions. [2018-01-24 21:00:27,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 21:00:27,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 21:00:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:27,241 INFO L225 Difference]: With dead ends: 250 [2018-01-24 21:00:27,241 INFO L226 Difference]: Without dead ends: 244 [2018-01-24 21:00:27,242 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-01-24 21:00:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-01-24 21:00:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 135. [2018-01-24 21:00:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-01-24 21:00:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2018-01-24 21:00:27,251 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 18 [2018-01-24 21:00:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:27,251 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2018-01-24 21:00:27,251 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:00:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2018-01-24 21:00:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 21:00:27,253 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:27,253 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:27,253 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1676211553, now seen corresponding path program 1 times [2018-01-24 21:00:27,253 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:27,254 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,254 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:27,254 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,255 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:27,269 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:27,424 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:27,424 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 21:00:27,424 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:27,424 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 21:00:27,425 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 21:00:27,425 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 21:00:27,425 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand 6 states. [2018-01-24 21:00:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:27,683 INFO L93 Difference]: Finished difference Result 254 states and 278 transitions. [2018-01-24 21:00:27,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 21:00:27,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-24 21:00:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:27,685 INFO L225 Difference]: With dead ends: 254 [2018-01-24 21:00:27,685 INFO L226 Difference]: Without dead ends: 218 [2018-01-24 21:00:27,686 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-01-24 21:00:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-01-24 21:00:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 194. [2018-01-24 21:00:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-01-24 21:00:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 224 transitions. [2018-01-24 21:00:27,699 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 224 transitions. Word has length 28 [2018-01-24 21:00:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:27,699 INFO L432 AbstractCegarLoop]: Abstraction has 194 states and 224 transitions. [2018-01-24 21:00:27,699 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 21:00:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 224 transitions. [2018-01-24 21:00:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 21:00:27,700 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:27,701 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:27,701 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:27,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1668173361, now seen corresponding path program 1 times [2018-01-24 21:00:27,701 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:27,702 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,702 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:27,702 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,702 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:27,712 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:27,739 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:27,739 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 21:00:27,739 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:27,739 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 21:00:27,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 21:00:27,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 21:00:27,740 INFO L87 Difference]: Start difference. First operand 194 states and 224 transitions. Second operand 3 states. [2018-01-24 21:00:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:27,784 INFO L93 Difference]: Finished difference Result 351 states and 397 transitions. [2018-01-24 21:00:27,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 21:00:27,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-01-24 21:00:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:27,785 INFO L225 Difference]: With dead ends: 351 [2018-01-24 21:00:27,785 INFO L226 Difference]: Without dead ends: 174 [2018-01-24 21:00:27,787 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 21:00:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-01-24 21:00:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 156. [2018-01-24 21:00:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-01-24 21:00:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 169 transitions. [2018-01-24 21:00:27,795 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 169 transitions. Word has length 28 [2018-01-24 21:00:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:27,796 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 169 transitions. [2018-01-24 21:00:27,796 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 21:00:27,796 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 169 transitions. [2018-01-24 21:00:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 21:00:27,796 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:27,796 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:27,797 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash -366492937, now seen corresponding path program 1 times [2018-01-24 21:00:27,797 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:27,797 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,797 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:27,798 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,798 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:27,808 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:27,867 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 21:00:27,868 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 21:00:27,868 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 21:00:27,868 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 21:00:27,868 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 21:00:27,869 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 21:00:27,869 INFO L87 Difference]: Start difference. First operand 156 states and 169 transitions. Second operand 4 states. [2018-01-24 21:00:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 21:00:27,912 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2018-01-24 21:00:27,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 21:00:27,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-01-24 21:00:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 21:00:27,914 INFO L225 Difference]: With dead ends: 159 [2018-01-24 21:00:27,914 INFO L226 Difference]: Without dead ends: 156 [2018-01-24 21:00:27,914 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 21:00:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-24 21:00:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-01-24 21:00:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-01-24 21:00:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 168 transitions. [2018-01-24 21:00:27,924 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 168 transitions. Word has length 29 [2018-01-24 21:00:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 21:00:27,924 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 168 transitions. [2018-01-24 21:00:27,924 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 21:00:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 168 transitions. [2018-01-24 21:00:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-24 21:00:27,926 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 21:00:27,926 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 21:00:27,928 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr54EnsuresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 21:00:27,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1827708399, now seen corresponding path program 1 times [2018-01-24 21:00:27,928 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 21:00:27,929 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,929 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 21:00:27,930 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 21:00:27,930 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 21:00:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 21:00:27,942 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 21:00:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 21:00:28,064 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 21:00:28,065 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 21:00:28,065 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2018-01-24 21:00:28,067 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [14], [17], [98], [103], [107], [155], [222], [344], [346], [349], [353], [355], [360], [364], [404], [410], [411], [412], [414], [415], [424], [425], [429], [430], [431] [2018-01-24 21:00:28,114 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 21:00:28,114 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