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_false-unreach-call_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:26:54,150 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:26:54,152 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:26:54,168 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:26:54,169 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:26:54,170 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:26:54,171 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:26:54,172 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:26:54,174 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:26:54,175 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:26:54,176 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:26:54,176 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:26:54,177 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:26:54,178 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:26:54,179 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:26:54,182 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:26:54,184 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:26:54,186 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:26:54,187 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:26:54,188 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:26:54,190 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:26:54,190 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:26:54,190 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:26:54,191 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:26:54,192 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:26:54,193 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:26:54,193 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:26:54,194 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:26:54,194 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:26:54,194 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:26:54,195 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:26:54,195 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 20:26:54,205 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:26:54,205 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:26:54,206 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:26:54,206 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:26:54,206 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:26:54,206 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:26:54,206 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:26:54,207 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:26:54,207 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:26:54,207 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:26:54,207 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:26:54,208 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:26:54,208 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:26:54,208 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:26:54,208 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:26:54,208 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:26:54,208 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:26:54,209 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:26:54,209 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:26:54,209 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:26:54,209 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:26:54,209 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:26:54,209 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:26:54,210 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:26:54,210 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:26:54,210 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:26:54,210 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:26:54,210 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:26:54,211 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:26:54,211 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:26:54,211 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:26:54,211 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:26:54,211 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:26:54,211 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:26:54,212 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:26:54,212 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:26:54,213 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:26:54,246 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:26:54,257 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:26:54,261 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:26:54,263 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:26:54,263 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:26:54,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/list-ext_false-unreach-call_false-valid-deref.i [2018-01-24 20:26:54,422 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:26:54,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:26:54,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:26:54,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:26:54,437 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:26:54,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:26:54" (1/1) ... [2018-01-24 20:26:54,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd00cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54, skipping insertion in model container [2018-01-24 20:26:54,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:26:54" (1/1) ... [2018-01-24 20:26:54,453 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:26:54,490 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:26:54,613 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:26:54,635 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:26:54,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54 WrapperNode [2018-01-24 20:26:54,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:26:54,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:26:54,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:26:54,647 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:26:54,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54" (1/1) ... [2018-01-24 20:26:54,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54" (1/1) ... [2018-01-24 20:26:54,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54" (1/1) ... [2018-01-24 20:26:54,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54" (1/1) ... [2018-01-24 20:26:54,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54" (1/1) ... [2018-01-24 20:26:54,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54" (1/1) ... [2018-01-24 20:26:54,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54" (1/1) ... [2018-01-24 20:26:54,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:26:54,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:26:54,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:26:54,687 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:26:54,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54" (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 20:26:54,738 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:26:54,738 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:26:54,738 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-24 20:26:54,738 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:26:54,738 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:26:54,738 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:26:54,738 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:26:54,739 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:26:54,739 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:26:54,739 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:26:54,739 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:26:54,739 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 20:26:54,739 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:26:54,739 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:26:54,739 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:26:54,740 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-24 20:26:54,740 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:26:54,740 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:26:54,740 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:26:55,150 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:26:55,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:26:55 BoogieIcfgContainer [2018-01-24 20:26:55,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:26:55,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:26:55,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:26:55,155 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:26:55,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:26:54" (1/3) ... [2018-01-24 20:26:55,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42059f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:26:55, skipping insertion in model container [2018-01-24 20:26:55,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:26:54" (2/3) ... [2018-01-24 20:26:55,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42059f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:26:55, skipping insertion in model container [2018-01-24 20:26:55,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:26:55" (3/3) ... [2018-01-24 20:26:55,159 INFO L105 eAbstractionObserver]: Analyzing ICFG list-ext_false-unreach-call_false-valid-deref.i [2018-01-24 20:26:55,167 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:26:55,173 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 33 error locations. [2018-01-24 20:26:55,217 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:26:55,217 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:26:55,217 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:26:55,217 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:26:55,218 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:26:55,218 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:26:55,218 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:26:55,218 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:26:55,219 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:26:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2018-01-24 20:26:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 20:26:55,245 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:55,246 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:26:55,246 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:55,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2135487731, now seen corresponding path program 1 times [2018-01-24 20:26:55,252 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:55,294 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:55,294 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:55,295 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:55,295 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:55,348 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:55,387 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 20:26:55,389 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:55,389 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:26:55,390 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:55,392 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 20:26:55,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 20:26:55,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 20:26:55,413 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 2 states. [2018-01-24 20:26:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:55,536 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2018-01-24 20:26:55,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 20:26:55,537 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-01-24 20:26:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:55,545 INFO L225 Difference]: With dead ends: 169 [2018-01-24 20:26:55,546 INFO L226 Difference]: Without dead ends: 90 [2018-01-24 20:26:55,549 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 20:26:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-01-24 20:26:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-01-24 20:26:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-01-24 20:26:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2018-01-24 20:26:55,585 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 13 [2018-01-24 20:26:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:55,585 INFO L432 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2018-01-24 20:26:55,585 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 20:26:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2018-01-24 20:26:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 20:26:55,586 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:55,586 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:26:55,586 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:55,587 INFO L82 PathProgramCache]: Analyzing trace with hash 757106509, now seen corresponding path program 1 times [2018-01-24 20:26:55,587 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:55,588 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:55,588 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:55,588 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:55,589 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:55,610 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:55,687 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 20:26:55,687 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:55,687 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:26:55,688 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:55,689 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:26:55,690 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:26:55,690 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:26:55,690 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 5 states. [2018-01-24 20:26:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:56,056 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2018-01-24 20:26:56,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:26:56,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 20:26:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:56,058 INFO L225 Difference]: With dead ends: 127 [2018-01-24 20:26:56,059 INFO L226 Difference]: Without dead ends: 111 [2018-01-24 20:26:56,059 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 20:26:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-24 20:26:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2018-01-24 20:26:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-01-24 20:26:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2018-01-24 20:26:56,067 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 15 [2018-01-24 20:26:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:56,068 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2018-01-24 20:26:56,068 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:26:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2018-01-24 20:26:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 20:26:56,068 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:56,068 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:26:56,068 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:56,069 INFO L82 PathProgramCache]: Analyzing trace with hash 757106510, now seen corresponding path program 1 times [2018-01-24 20:26:56,069 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:56,070 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:56,070 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:56,070 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:56,070 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:56,081 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:56,163 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 20:26:56,163 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:56,163 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:26:56,163 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:56,163 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:26:56,163 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:26:56,164 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:26:56,164 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand 5 states. [2018-01-24 20:26:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:56,368 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2018-01-24 20:26:56,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:26:56,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 20:26:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:56,370 INFO L225 Difference]: With dead ends: 146 [2018-01-24 20:26:56,370 INFO L226 Difference]: Without dead ends: 130 [2018-01-24 20:26:56,371 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 20:26:56,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-24 20:26:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2018-01-24 20:26:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-24 20:26:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2018-01-24 20:26:56,383 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 15 [2018-01-24 20:26:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:56,384 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2018-01-24 20:26:56,384 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:26:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2018-01-24 20:26:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:26:56,385 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:56,386 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 20:26:56,386 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:56,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1442918817, now seen corresponding path program 1 times [2018-01-24 20:26:56,386 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:56,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:56,387 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:56,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:56,388 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:56,410 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:56,492 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 20:26:56,492 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:56,493 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:26:56,493 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:56,493 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:26:56,493 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:26:56,494 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:26:56,494 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand 7 states. [2018-01-24 20:26:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:56,928 INFO L93 Difference]: Finished difference Result 229 states and 256 transitions. [2018-01-24 20:26:56,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:26:56,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-24 20:26:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:56,933 INFO L225 Difference]: With dead ends: 229 [2018-01-24 20:26:56,933 INFO L226 Difference]: Without dead ends: 226 [2018-01-24 20:26:56,934 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 20:26:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-01-24 20:26:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 124. [2018-01-24 20:26:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-24 20:26:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2018-01-24 20:26:56,949 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 26 [2018-01-24 20:26:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:56,949 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2018-01-24 20:26:56,949 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:26:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2018-01-24 20:26:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:26:56,951 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:56,951 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 20:26:56,951 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:56,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1442918818, now seen corresponding path program 1 times [2018-01-24 20:26:56,952 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:56,953 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:56,953 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:56,953 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:56,953 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:56,973 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:57,075 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 20:26:57,075 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:57,076 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:26:57,076 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:57,076 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:26:57,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:26:57,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:26:57,077 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand 7 states. [2018-01-24 20:26:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:57,499 INFO L93 Difference]: Finished difference Result 249 states and 278 transitions. [2018-01-24 20:26:57,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 20:26:57,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-24 20:26:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:57,501 INFO L225 Difference]: With dead ends: 249 [2018-01-24 20:26:57,501 INFO L226 Difference]: Without dead ends: 242 [2018-01-24 20:26:57,502 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 20:26:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-01-24 20:26:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 105. [2018-01-24 20:26:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-01-24 20:26:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2018-01-24 20:26:57,515 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 26 [2018-01-24 20:26:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:57,515 INFO L432 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2018-01-24 20:26:57,515 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:26:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2018-01-24 20:26:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 20:26:57,517 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:57,517 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] [2018-01-24 20:26:57,517 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash 317364595, now seen corresponding path program 1 times [2018-01-24 20:26:57,517 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:57,518 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:57,518 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:57,518 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:57,519 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:57,532 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:57,608 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 20:26:57,608 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:57,608 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:26:57,608 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:57,608 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:26:57,609 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:26:57,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:26:57,609 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 6 states. [2018-01-24 20:26:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:57,772 INFO L93 Difference]: Finished difference Result 233 states and 255 transitions. [2018-01-24 20:26:57,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:26:57,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-01-24 20:26:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:57,773 INFO L225 Difference]: With dead ends: 233 [2018-01-24 20:26:57,774 INFO L226 Difference]: Without dead ends: 187 [2018-01-24 20:26:57,774 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:26:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-01-24 20:26:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 118. [2018-01-24 20:26:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-24 20:26:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2018-01-24 20:26:57,786 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 27 [2018-01-24 20:26:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:57,786 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2018-01-24 20:26:57,786 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:26:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2018-01-24 20:26:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:26:57,788 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:57,788 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 20:26:57,788 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash 135192649, now seen corresponding path program 1 times [2018-01-24 20:26:57,788 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:57,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:57,790 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:57,790 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:57,790 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:57,807 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:57,886 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 20:26:57,886 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:57,886 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:26:57,886 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:57,887 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:26:57,887 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:26:57,887 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:26:57,887 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand 7 states. [2018-01-24 20:26:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:58,091 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2018-01-24 20:26:58,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 20:26:58,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-01-24 20:26:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:58,093 INFO L225 Difference]: With dead ends: 159 [2018-01-24 20:26:58,093 INFO L226 Difference]: Without dead ends: 157 [2018-01-24 20:26:58,093 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 20:26:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-01-24 20:26:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2018-01-24 20:26:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-01-24 20:26:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2018-01-24 20:26:58,100 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 30 [2018-01-24 20:26:58,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:58,101 INFO L432 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2018-01-24 20:26:58,101 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:26:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2018-01-24 20:26:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:26:58,102 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:58,102 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 20:26:58,102 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash 135192650, now seen corresponding path program 1 times [2018-01-24 20:26:58,102 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:58,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:58,103 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:58,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:58,103 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:58,117 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:58,228 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 20:26:58,228 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:58,228 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:26:58,228 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:58,228 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:26:58,229 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:26:58,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:26:58,229 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand 7 states. [2018-01-24 20:26:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:58,952 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2018-01-24 20:26:58,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:26:58,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-01-24 20:26:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:58,954 INFO L225 Difference]: With dead ends: 175 [2018-01-24 20:26:58,954 INFO L226 Difference]: Without dead ends: 171 [2018-01-24 20:26:58,954 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 20:26:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-01-24 20:26:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 101. [2018-01-24 20:26:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-01-24 20:26:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2018-01-24 20:26:58,964 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 30 [2018-01-24 20:26:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:58,964 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2018-01-24 20:26:58,964 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:26:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2018-01-24 20:26:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:26:58,965 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:58,965 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:26:58,966 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1848368372, now seen corresponding path program 1 times [2018-01-24 20:26:58,966 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:58,967 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:58,967 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:58,967 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:58,967 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:58,976 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:59,035 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 20:26:59,036 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:59,036 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:26:59,036 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:59,036 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:26:59,037 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:26:59,037 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:26:59,037 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 6 states. [2018-01-24 20:26:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:59,196 INFO L93 Difference]: Finished difference Result 192 states and 208 transitions. [2018-01-24 20:26:59,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:26:59,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2018-01-24 20:26:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:59,197 INFO L225 Difference]: With dead ends: 192 [2018-01-24 20:26:59,197 INFO L226 Difference]: Without dead ends: 156 [2018-01-24 20:26:59,197 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:26:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-24 20:26:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2018-01-24 20:26:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-24 20:26:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2018-01-24 20:26:59,203 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 30 [2018-01-24 20:26:59,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:59,204 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2018-01-24 20:26:59,204 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:26:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2018-01-24 20:26:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 20:26:59,204 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:59,204 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] [2018-01-24 20:26:59,205 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:59,205 INFO L82 PathProgramCache]: Analyzing trace with hash 772815435, now seen corresponding path program 1 times [2018-01-24 20:26:59,205 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:59,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:59,206 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:59,206 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:59,206 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:59,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:59,252 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 20:26:59,253 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:26:59,253 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:26:59,253 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:26:59,253 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:26:59,254 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:26:59,254 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:26:59,254 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand 3 states. [2018-01-24 20:26:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:26:59,279 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2018-01-24 20:26:59,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:26:59,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2018-01-24 20:26:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:26:59,281 INFO L225 Difference]: With dead ends: 129 [2018-01-24 20:26:59,281 INFO L226 Difference]: Without dead ends: 95 [2018-01-24 20:26:59,281 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:26:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-01-24 20:26:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-01-24 20:26:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-01-24 20:26:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2018-01-24 20:26:59,289 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 35 [2018-01-24 20:26:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:26:59,289 INFO L432 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2018-01-24 20:26:59,289 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:26:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2018-01-24 20:26:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 20:26:59,290 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:26:59,291 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] [2018-01-24 20:26:59,291 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:26:59,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1113019023, now seen corresponding path program 1 times [2018-01-24 20:26:59,291 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:26:59,292 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:59,292 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:26:59,292 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:26:59,292 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:26:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:26:59,317 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:26:59,622 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 20:26:59,622 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:26:59,622 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:26:59,623 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-01-24 20:26:59,624 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], [95], [97], [98], [104], [105], [108], [177], [178], [188], [189], [190] [2018-01-24 20:26:59,667 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:26:59,667 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