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.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:15:05,334 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:15:05,336 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:15:05,351 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:15:05,351 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:15:05,352 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:15:05,353 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:15:05,355 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:15:05,358 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:15:05,358 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:15:05,359 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:15:05,360 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:15:05,361 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:15:05,362 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:15:05,363 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:15:05,366 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:15:05,368 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:15:05,370 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:15:05,371 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:15:05,373 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:15:05,375 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 16:15:05,380 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 16:15:05,381 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 16:15:05,381 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.epf [2018-01-24 16:15:05,392 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:15:05,393 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:15:05,394 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:15:05,394 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:15:05,394 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:15:05,394 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:15:05,394 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:15:05,395 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:15:05,395 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:15:05,395 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:15:05,396 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:15:05,396 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:15:05,396 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:15:05,396 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:15:05,396 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:15:05,397 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:15:05,397 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:15:05,397 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:15:05,397 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:15:05,397 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:15:05,397 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:15:05,398 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:15:05,398 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:15:05,398 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:15:05,398 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:15:05,399 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:15:05,399 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:15:05,399 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:15:05,399 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 16:15:05,399 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:15:05,399 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:15:05,400 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:15:05,400 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 16:15:05,401 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:15:05,401 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:15:05,435 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:15:05,451 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:15:05,455 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:15:05,457 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:15:05,457 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:15:05,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-24 16:15:05,787 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:15:05,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:15:05,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:15:05,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:15:05,799 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:15:05,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:15:05" (1/1) ... [2018-01-24 16:15:05,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365d5287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:05, skipping insertion in model container [2018-01-24 16:15:05,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:15:05" (1/1) ... [2018-01-24 16:15:05,821 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:15:05,868 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:15:05,986 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:15:06,004 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:15:06,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06 WrapperNode [2018-01-24 16:15:06,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:15:06,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:15:06,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:15:06,016 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:15:06,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06" (1/1) ... [2018-01-24 16:15:06,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06" (1/1) ... [2018-01-24 16:15:06,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06" (1/1) ... [2018-01-24 16:15:06,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06" (1/1) ... [2018-01-24 16:15:06,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06" (1/1) ... [2018-01-24 16:15:06,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06" (1/1) ... [2018-01-24 16:15:06,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06" (1/1) ... [2018-01-24 16:15:06,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:15:06,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:15:06,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:15:06,059 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:15:06,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06" (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 16:15:06,112 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:15:06,160 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:15:06,160 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:15:06,160 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 16:15:06,160 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 16:15:06,160 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 16:15:06,160 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 16:15:06,161 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:15:06,161 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:15:06,161 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 16:15:06,161 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 16:15:06,161 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 16:15:06,161 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:15:06,161 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 16:15:06,161 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:15:06,161 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:15:06,162 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:15:06,655 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:15:06,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:15:06 BoogieIcfgContainer [2018-01-24 16:15:06,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:15:06,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 16:15:06,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 16:15:06,659 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 16:15:06,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 04:15:05" (1/3) ... [2018-01-24 16:15:06,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1dce35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:15:06, skipping insertion in model container [2018-01-24 16:15:06,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:15:06" (2/3) ... [2018-01-24 16:15:06,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1dce35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:15:06, skipping insertion in model container [2018-01-24 16:15:06,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:15:06" (3/3) ... [2018-01-24 16:15:06,663 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-24 16:15:06,670 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 16:15:06,722 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 47 error locations. [2018-01-24 16:15:06,765 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 16:15:06,765 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 16:15:06,765 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 16:15:06,765 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 16:15:06,765 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 16:15:06,765 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 16:15:06,765 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 16:15:06,765 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 16:15:06,766 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 16:15:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2018-01-24 16:15:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 16:15:06,791 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:06,792 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:15:06,792 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:06,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2026691577, now seen corresponding path program 1 times [2018-01-24 16:15:06,798 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:06,851 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:06,852 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:06,852 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:06,852 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:06,896 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:06,959 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 16:15:06,961 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:15:06,962 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:15:06,962 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:15:06,964 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:15:06,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:15:06,975 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:15:06,977 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states. [2018-01-24 16:15:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:15:07,346 INFO L93 Difference]: Finished difference Result 199 states and 248 transitions. [2018-01-24 16:15:07,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:15:07,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 16:15:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:15:07,360 INFO L225 Difference]: With dead ends: 199 [2018-01-24 16:15:07,360 INFO L226 Difference]: Without dead ends: 126 [2018-01-24 16:15:07,366 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 16:15:07,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-01-24 16:15:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2018-01-24 16:15:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-01-24 16:15:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2018-01-24 16:15:07,411 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 8 [2018-01-24 16:15:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:15:07,411 INFO L432 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2018-01-24 16:15:07,411 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:15:07,411 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2018-01-24 16:15:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 16:15:07,412 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:07,412 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:15:07,412 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:07,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2026691576, now seen corresponding path program 1 times [2018-01-24 16:15:07,413 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:07,414 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:07,414 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:07,415 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:07,415 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:07,431 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:07,505 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 16:15:07,505 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:15:07,505 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:15:07,505 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:15:07,507 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:15:07,507 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:15:07,508 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:15:07,508 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand 4 states. [2018-01-24 16:15:07,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:15:07,691 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2018-01-24 16:15:07,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:15:07,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 16:15:07,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:15:07,693 INFO L225 Difference]: With dead ends: 131 [2018-01-24 16:15:07,694 INFO L226 Difference]: Without dead ends: 124 [2018-01-24 16:15:07,695 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 16:15:07,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-01-24 16:15:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2018-01-24 16:15:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-01-24 16:15:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2018-01-24 16:15:07,707 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 8 [2018-01-24 16:15:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:15:07,707 INFO L432 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2018-01-24 16:15:07,707 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:15:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2018-01-24 16:15:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 16:15:07,708 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:07,708 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:15:07,709 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:07,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1176954998, now seen corresponding path program 1 times [2018-01-24 16:15:07,709 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:07,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:07,711 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:07,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:07,711 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:07,733 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:07,805 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 16:15:07,806 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:15:07,806 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:15:07,806 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:15:07,807 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:15:07,807 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:15:07,807 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:15:07,807 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 4 states. [2018-01-24 16:15:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:15:08,019 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2018-01-24 16:15:08,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:15:08,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-24 16:15:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:15:08,021 INFO L225 Difference]: With dead ends: 135 [2018-01-24 16:15:08,021 INFO L226 Difference]: Without dead ends: 123 [2018-01-24 16:15:08,021 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 16:15:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-24 16:15:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2018-01-24 16:15:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-01-24 16:15:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2018-01-24 16:15:08,032 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 15 [2018-01-24 16:15:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:15:08,032 INFO L432 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2018-01-24 16:15:08,032 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:15:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2018-01-24 16:15:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 16:15:08,033 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:08,033 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:15:08,034 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:08,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1176954997, now seen corresponding path program 1 times [2018-01-24 16:15:08,034 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:08,035 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:08,036 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:08,036 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:08,036 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:08,058 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:08,174 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 16:15:08,174 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:15:08,175 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 16:15:08,175 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:15:08,175 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 16:15:08,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 16:15:08,175 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:15:08,175 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand 7 states. [2018-01-24 16:15:08,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:15:08,414 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2018-01-24 16:15:08,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 16:15:08,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-01-24 16:15:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:15:08,416 INFO L225 Difference]: With dead ends: 145 [2018-01-24 16:15:08,416 INFO L226 Difference]: Without dead ends: 139 [2018-01-24 16:15:08,416 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-01-24 16:15:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-01-24 16:15:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2018-01-24 16:15:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-01-24 16:15:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2018-01-24 16:15:08,427 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 15 [2018-01-24 16:15:08,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:15:08,428 INFO L432 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2018-01-24 16:15:08,428 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 16:15:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2018-01-24 16:15:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 16:15:08,429 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:08,429 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 16:15:08,429 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1446653265, now seen corresponding path program 1 times [2018-01-24 16:15:08,429 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:08,431 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:08,431 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:08,431 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:08,431 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:08,447 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:08,502 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 16:15:08,503 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:15:08,503 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:15:08,503 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:15:08,504 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:15:08,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:15:08,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:15:08,504 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 6 states. [2018-01-24 16:15:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:15:08,742 INFO L93 Difference]: Finished difference Result 186 states and 203 transitions. [2018-01-24 16:15:08,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 16:15:08,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 16:15:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:15:08,744 INFO L225 Difference]: With dead ends: 186 [2018-01-24 16:15:08,744 INFO L226 Difference]: Without dead ends: 185 [2018-01-24 16:15:08,744 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 16:15:08,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-01-24 16:15:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 115. [2018-01-24 16:15:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-24 16:15:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2018-01-24 16:15:08,751 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 18 [2018-01-24 16:15:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:15:08,751 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2018-01-24 16:15:08,751 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:15:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2018-01-24 16:15:08,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 16:15:08,752 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:08,752 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 16:15:08,752 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:08,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1446653266, now seen corresponding path program 1 times [2018-01-24 16:15:08,752 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:08,753 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:08,753 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:08,753 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:08,754 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:08,767 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:08,874 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 16:15:08,874 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:15:08,874 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:15:08,874 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:15:08,875 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:15:08,875 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:15:08,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:15:08,875 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 6 states. [2018-01-24 16:15:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:15:09,139 INFO L93 Difference]: Finished difference Result 196 states and 214 transitions. [2018-01-24 16:15:09,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 16:15:09,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 16:15:09,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:15:09,140 INFO L225 Difference]: With dead ends: 196 [2018-01-24 16:15:09,140 INFO L226 Difference]: Without dead ends: 189 [2018-01-24 16:15:09,141 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 16:15:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-01-24 16:15:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 110. [2018-01-24 16:15:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-01-24 16:15:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2018-01-24 16:15:09,148 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 18 [2018-01-24 16:15:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:15:09,148 INFO L432 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2018-01-24 16:15:09,148 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:15:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2018-01-24 16:15:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 16:15:09,149 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:09,150 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:15:09,150 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:09,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1020537408, now seen corresponding path program 1 times [2018-01-24 16:15:09,150 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:09,152 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:09,152 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:09,152 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:09,152 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:09,169 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:09,230 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 16:15:09,230 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:15:09,231 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:15:09,231 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:15:09,231 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:15:09,231 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:15:09,231 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:15:09,232 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand 6 states. [2018-01-24 16:15:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:15:09,439 INFO L93 Difference]: Finished difference Result 199 states and 219 transitions. [2018-01-24 16:15:09,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 16:15:09,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-01-24 16:15:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:15:09,440 INFO L225 Difference]: With dead ends: 199 [2018-01-24 16:15:09,441 INFO L226 Difference]: Without dead ends: 198 [2018-01-24 16:15:09,441 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-24 16:15:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-01-24 16:15:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2018-01-24 16:15:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-01-24 16:15:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2018-01-24 16:15:09,446 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 26 [2018-01-24 16:15:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:15:09,447 INFO L432 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2018-01-24 16:15:09,447 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:15:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2018-01-24 16:15:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 16:15:09,447 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:09,447 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:15:09,448 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1020537407, now seen corresponding path program 1 times [2018-01-24 16:15:09,448 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:09,449 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:09,449 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:09,449 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:09,449 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:09,465 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:09,595 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 16:15:09,595 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:15:09,596 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:15:09,596 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:15:09,596 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:15:09,596 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:15:09,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:15:09,597 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 6 states. [2018-01-24 16:15:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:15:09,848 INFO L93 Difference]: Finished difference Result 195 states and 214 transitions. [2018-01-24 16:15:09,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 16:15:09,849 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-01-24 16:15:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:15:09,850 INFO L225 Difference]: With dead ends: 195 [2018-01-24 16:15:09,850 INFO L226 Difference]: Without dead ends: 191 [2018-01-24 16:15:09,851 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 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 16:15:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-01-24 16:15:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 99. [2018-01-24 16:15:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-01-24 16:15:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2018-01-24 16:15:09,859 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 26 [2018-01-24 16:15:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:15:09,859 INFO L432 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2018-01-24 16:15:09,860 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:15:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2018-01-24 16:15:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 16:15:09,861 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:09,861 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 16:15:09,863 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:09,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1179857763, now seen corresponding path program 1 times [2018-01-24 16:15:09,864 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:09,865 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:09,865 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:09,865 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:09,865 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:09,873 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:09,926 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 16:15:09,926 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:15:09,926 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:15:09,926 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:15:09,927 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 16:15:09,927 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 16:15:09,927 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:15:09,927 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand 5 states. [2018-01-24 16:15:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:15:10,070 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2018-01-24 16:15:10,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:15:10,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-24 16:15:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:15:10,071 INFO L225 Difference]: With dead ends: 150 [2018-01-24 16:15:10,071 INFO L226 Difference]: Without dead ends: 114 [2018-01-24 16:15:10,072 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:15:10,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-24 16:15:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2018-01-24 16:15:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-01-24 16:15:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2018-01-24 16:15:10,082 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 27 [2018-01-24 16:15:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:15:10,082 INFO L432 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2018-01-24 16:15:10,083 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 16:15:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2018-01-24 16:15:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 16:15:10,084 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:15:10,084 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] [2018-01-24 16:15:10,084 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr39RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr46EnsuresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr34RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, mainErr37RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:15:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2127198597, now seen corresponding path program 1 times [2018-01-24 16:15:10,084 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:15:10,088 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:10,088 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:15:10,088 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:15:10,088 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:15:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:15:10,099 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:15:10,247 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 16:15:10,248 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 16:15:10,248 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 16:15:10,249 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-01-24 16:15:10,251 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [14], [17], [61], [65], [70], [74], [82], [83], [90], [94], [102], [108], [109], [110], [158], [160], [163], [213], [214], [218], [219], [220] [2018-01-24 16:15:10,314 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 16:15:10,314 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