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/list-ext-properties/list-ext_1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:29:00,215 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:29:00,216 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:29:00,232 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:29:00,232 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:29:00,233 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:29:00,234 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:29:00,236 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:29:00,238 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:29:00,239 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:29:00,239 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:29:00,240 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:29:00,241 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:29:00,242 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:29:00,243 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:29:00,245 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:29:00,247 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:29:00,249 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:29:00,251 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:29:00,252 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:29:00,254 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:29:00,254 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:29:00,255 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:29:00,256 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:29:00,257 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:29:00,258 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:29:00,258 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:29:00,259 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:29:00,259 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:29:00,259 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:29:00,260 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:29:00,260 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 20:29:00,269 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:29:00,269 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:29:00,270 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:29:00,270 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:29:00,270 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:29:00,270 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:29:00,271 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:29:00,271 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:29:00,271 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:29:00,271 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:29:00,271 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:29:00,271 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:29:00,272 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:29:00,272 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:29:00,272 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:29:00,272 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:29:00,272 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:29:00,272 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:29:00,272 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:29:00,272 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:29:00,273 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:29:00,273 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:29:00,273 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:29:00,273 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:29:00,273 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:29:00,274 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:29:00,274 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:29:00,274 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:29:00,274 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:29:00,274 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:29:00,274 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:29:00,274 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:29:00,275 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:29:00,275 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:29:00,275 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:29:00,275 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:29:00,276 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:29:00,308 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:29:00,319 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:29:00,322 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:29:00,323 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:29:00,323 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:29:00,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/list-ext_1_true-valid-memsafety.i [2018-01-24 20:29:00,479 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:29:00,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:29:00,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:29:00,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:29:00,490 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:29:00,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:29:00" (1/1) ... [2018-01-24 20:29:00,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4430c394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00, skipping insertion in model container [2018-01-24 20:29:00,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:29:00" (1/1) ... [2018-01-24 20:29:00,509 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:29:00,546 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:29:00,671 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:29:00,694 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:29:00,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00 WrapperNode [2018-01-24 20:29:00,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:29:00,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:29:00,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:29:00,705 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:29:00,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00" (1/1) ... [2018-01-24 20:29:00,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00" (1/1) ... [2018-01-24 20:29:00,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00" (1/1) ... [2018-01-24 20:29:00,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00" (1/1) ... [2018-01-24 20:29:00,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00" (1/1) ... [2018-01-24 20:29:00,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00" (1/1) ... [2018-01-24 20:29:00,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00" (1/1) ... [2018-01-24 20:29:00,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:29:00,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:29:00,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:29:00,741 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:29:00,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:29:00,794 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:29:00,795 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:29:00,795 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-24 20:29:00,795 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:29:00,795 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:29:00,795 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:29:00,795 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-24 20:29:00,796 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:29:00,797 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:29:00,797 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:29:01,214 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:29:01,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:29:01 BoogieIcfgContainer [2018-01-24 20:29:01,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:29:01,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:29:01,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:29:01,217 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:29:01,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:29:00" (1/3) ... [2018-01-24 20:29:01,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff1153f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:29:01, skipping insertion in model container [2018-01-24 20:29:01,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:29:00" (2/3) ... [2018-01-24 20:29:01,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff1153f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:29:01, skipping insertion in model container [2018-01-24 20:29:01,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:29:01" (3/3) ... [2018-01-24 20:29:01,220 INFO L105 eAbstractionObserver]: Analyzing ICFG list-ext_1_true-valid-memsafety.i [2018-01-24 20:29:01,226 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:29:01,232 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 35 error locations. [2018-01-24 20:29:01,276 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:29:01,276 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:29:01,276 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:29:01,277 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:29:01,277 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:29:01,277 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:29:01,277 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:29:01,277 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:29:01,278 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:29:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states. [2018-01-24 20:29:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 20:29:01,306 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:01,307 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:01,307 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:01,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1146304688, now seen corresponding path program 1 times [2018-01-24 20:29:01,312 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:01,352 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:01,353 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:01,353 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:01,353 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:01,400 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:01,443 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:01,444 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:29:01,444 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:01,448 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 20:29:01,465 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 20:29:01,466 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 20:29:01,468 INFO L87 Difference]: Start difference. First operand 102 states. Second operand 2 states. [2018-01-24 20:29:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:01,583 INFO L93 Difference]: Finished difference Result 175 states and 198 transitions. [2018-01-24 20:29:01,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 20:29:01,584 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-01-24 20:29:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:01,592 INFO L225 Difference]: With dead ends: 175 [2018-01-24 20:29:01,592 INFO L226 Difference]: Without dead ends: 93 [2018-01-24 20:29:01,596 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 20:29:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-24 20:29:01,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-01-24 20:29:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-01-24 20:29:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2018-01-24 20:29:01,632 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 13 [2018-01-24 20:29:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:01,632 INFO L432 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2018-01-24 20:29:01,632 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 20:29:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2018-01-24 20:29:01,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 20:29:01,633 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:01,633 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:01,633 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:01,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2120728880, now seen corresponding path program 1 times [2018-01-24 20:29:01,633 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:01,634 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:01,635 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:01,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:01,635 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:01,659 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:01,730 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:01,730 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:29:01,731 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:01,732 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:29:01,733 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:29:01,733 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:29:01,733 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 5 states. [2018-01-24 20:29:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:02,074 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2018-01-24 20:29:02,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:29:02,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 20:29:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:02,076 INFO L225 Difference]: With dead ends: 130 [2018-01-24 20:29:02,076 INFO L226 Difference]: Without dead ends: 113 [2018-01-24 20:29:02,077 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:29:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-01-24 20:29:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2018-01-24 20:29:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-01-24 20:29:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2018-01-24 20:29:02,086 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 15 [2018-01-24 20:29:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:02,086 INFO L432 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2018-01-24 20:29:02,086 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:29:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2018-01-24 20:29:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 20:29:02,087 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:02,087 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:02,087 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:02,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2120728879, now seen corresponding path program 1 times [2018-01-24 20:29:02,087 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:02,088 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:02,088 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:02,088 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:02,088 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:02,100 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:02,171 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:02,171 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:29:02,172 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:02,172 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:29:02,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:29:02,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:29:02,173 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand 5 states. [2018-01-24 20:29:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:02,381 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2018-01-24 20:29:02,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:29:02,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 20:29:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:02,383 INFO L225 Difference]: With dead ends: 150 [2018-01-24 20:29:02,383 INFO L226 Difference]: Without dead ends: 133 [2018-01-24 20:29:02,383 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:29:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-01-24 20:29:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2018-01-24 20:29:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-24 20:29:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2018-01-24 20:29:02,394 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 15 [2018-01-24 20:29:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:02,394 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2018-01-24 20:29:02,394 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:29:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2018-01-24 20:29:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:29:02,395 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:02,395 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:02,395 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:02,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1313389118, now seen corresponding path program 1 times [2018-01-24 20:29:02,396 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:02,397 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:02,397 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:02,397 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:02,397 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:02,416 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:02,496 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:02,496 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:29:02,496 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:02,497 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:29:02,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:29:02,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:29:02,497 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand 7 states. [2018-01-24 20:29:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:02,919 INFO L93 Difference]: Finished difference Result 236 states and 263 transitions. [2018-01-24 20:29:02,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:29:02,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-24 20:29:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:02,958 INFO L225 Difference]: With dead ends: 236 [2018-01-24 20:29:02,958 INFO L226 Difference]: Without dead ends: 233 [2018-01-24 20:29:02,959 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-01-24 20:29:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-01-24 20:29:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 127. [2018-01-24 20:29:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-24 20:29:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2018-01-24 20:29:02,975 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 26 [2018-01-24 20:29:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:02,975 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2018-01-24 20:29:02,975 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:29:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2018-01-24 20:29:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:29:02,977 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:02,977 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:02,977 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1313389119, now seen corresponding path program 1 times [2018-01-24 20:29:02,978 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:02,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:02,979 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:02,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:02,979 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:02,998 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:03,085 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:03,085 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:29:03,085 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:03,086 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:29:03,086 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:29:03,086 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:29:03,087 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand 7 states. [2018-01-24 20:29:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:03,447 INFO L93 Difference]: Finished difference Result 256 states and 285 transitions. [2018-01-24 20:29:03,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 20:29:03,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-24 20:29:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:03,449 INFO L225 Difference]: With dead ends: 256 [2018-01-24 20:29:03,449 INFO L226 Difference]: Without dead ends: 248 [2018-01-24 20:29:03,450 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-01-24 20:29:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-01-24 20:29:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 108. [2018-01-24 20:29:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-01-24 20:29:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 120 transitions. [2018-01-24 20:29:03,457 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 120 transitions. Word has length 26 [2018-01-24 20:29:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:03,457 INFO L432 AbstractCegarLoop]: Abstraction has 108 states and 120 transitions. [2018-01-24 20:29:03,457 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:29:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 120 transitions. [2018-01-24 20:29:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 20:29:03,458 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:03,458 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:03,458 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash 356417959, now seen corresponding path program 1 times [2018-01-24 20:29:03,458 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:03,459 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:03,459 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:03,459 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:03,459 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:03,473 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:03,572 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:03,572 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:29:03,572 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:03,573 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:29:03,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:29:03,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:29:03,573 INFO L87 Difference]: Start difference. First operand 108 states and 120 transitions. Second operand 7 states. [2018-01-24 20:29:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:03,746 INFO L93 Difference]: Finished difference Result 237 states and 259 transitions. [2018-01-24 20:29:03,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:29:03,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-01-24 20:29:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:03,748 INFO L225 Difference]: With dead ends: 237 [2018-01-24 20:29:03,748 INFO L226 Difference]: Without dead ends: 191 [2018-01-24 20:29:03,748 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:29:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-01-24 20:29:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 122. [2018-01-24 20:29:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-24 20:29:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2018-01-24 20:29:03,761 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 28 [2018-01-24 20:29:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:03,761 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2018-01-24 20:29:03,761 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:29:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2018-01-24 20:29:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:29:03,763 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:03,763 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:03,763 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:03,764 INFO L82 PathProgramCache]: Analyzing trace with hash 167170662, now seen corresponding path program 1 times [2018-01-24 20:29:03,764 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:03,765 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:03,765 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:03,765 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:03,765 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:03,780 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:03,827 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:03,828 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:29:03,828 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:03,828 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:29:03,828 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:29:03,828 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:29:03,828 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand 7 states. [2018-01-24 20:29:04,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:04,013 INFO L93 Difference]: Finished difference Result 163 states and 183 transitions. [2018-01-24 20:29:04,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 20:29:04,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-01-24 20:29:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:04,015 INFO L225 Difference]: With dead ends: 163 [2018-01-24 20:29:04,015 INFO L226 Difference]: Without dead ends: 161 [2018-01-24 20:29:04,016 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-01-24 20:29:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-01-24 20:29:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 120. [2018-01-24 20:29:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-24 20:29:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2018-01-24 20:29:04,030 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 30 [2018-01-24 20:29:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:04,030 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2018-01-24 20:29:04,031 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:29:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2018-01-24 20:29:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:29:04,032 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:04,032 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:04,032 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash 167170663, now seen corresponding path program 1 times [2018-01-24 20:29:04,033 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:04,033 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:04,034 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:04,034 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:04,034 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:04,048 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:04,153 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:04,153 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:29:04,153 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:04,154 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:29:04,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:29:04,154 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:29:04,154 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand 7 states. [2018-01-24 20:29:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:04,775 INFO L93 Difference]: Finished difference Result 179 states and 200 transitions. [2018-01-24 20:29:04,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:29:04,776 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-01-24 20:29:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:04,777 INFO L225 Difference]: With dead ends: 179 [2018-01-24 20:29:04,777 INFO L226 Difference]: Without dead ends: 174 [2018-01-24 20:29:04,777 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:29:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-01-24 20:29:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 103. [2018-01-24 20:29:04,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-24 20:29:04,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2018-01-24 20:29:04,787 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 30 [2018-01-24 20:29:04,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:04,787 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2018-01-24 20:29:04,787 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:29:04,788 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2018-01-24 20:29:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-24 20:29:04,789 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:04,789 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:04,789 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:04,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1351001059, now seen corresponding path program 1 times [2018-01-24 20:29:04,789 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:04,790 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:04,790 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:04,790 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:04,791 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:04,803 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:04,883 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:04,883 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:29:04,883 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:04,883 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:29:04,884 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:29:04,884 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:29:04,884 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 7 states. [2018-01-24 20:29:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:05,044 INFO L93 Difference]: Finished difference Result 194 states and 210 transitions. [2018-01-24 20:29:05,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:29:05,044 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2018-01-24 20:29:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:05,045 INFO L225 Difference]: With dead ends: 194 [2018-01-24 20:29:05,045 INFO L226 Difference]: Without dead ends: 158 [2018-01-24 20:29:05,045 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:29:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-01-24 20:29:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 106. [2018-01-24 20:29:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-01-24 20:29:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2018-01-24 20:29:05,052 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 31 [2018-01-24 20:29:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:05,052 INFO L432 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2018-01-24 20:29:05,052 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:29:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2018-01-24 20:29:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-24 20:29:05,053 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:05,053 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:05,054 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:05,054 INFO L82 PathProgramCache]: Analyzing trace with hash 730013695, now seen corresponding path program 1 times [2018-01-24 20:29:05,054 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:05,055 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:05,055 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:05,055 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:05,055 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:05,069 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:05,330 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:29:05,330 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:29:05,330 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:29:05,331 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:29:05,331 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:29:05,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:29:05,331 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand 6 states. [2018-01-24 20:29:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:29:05,632 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2018-01-24 20:29:05,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 20:29:05,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-24 20:29:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:29:05,633 INFO L225 Difference]: With dead ends: 136 [2018-01-24 20:29:05,633 INFO L226 Difference]: Without dead ends: 132 [2018-01-24 20:29:05,634 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:29:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-01-24 20:29:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2018-01-24 20:29:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-24 20:29:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2018-01-24 20:29:05,643 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 36 [2018-01-24 20:29:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:29:05,643 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2018-01-24 20:29:05,643 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:29:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2018-01-24 20:29:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-24 20:29:05,645 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:29:05,645 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:29:05,645 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:29:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash 150288015, now seen corresponding path program 1 times [2018-01-24 20:29:05,645 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:29:05,646 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:05,647 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:29:05,647 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:29:05,647 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:29:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:29:05,664 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:29:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:29:05,881 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:29:05,882 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:29:05,882 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-01-24 20:29:05,884 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [14], [16], [19], [25], [52], [54], [57], [63], [65], [66], [69], [70], [76], [78], [81], [84], [88], [91], [94], [98], [100], [101], [107], [108], [111], [180], [181], [191], [192], [193] [2018-01-24 20:29:05,929 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:29:05,930 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