java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:08:35,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:08:35,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:08:35,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 16:08:35,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 16:08:35,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 16:08:35,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 16:08:35,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 16:08:35,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 16:08:35,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 16:08:35,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 16:08:35,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 16:08:35,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 16:08:35,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 16:08:35,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 16:08:35,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 16:08:35,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 16:08:35,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:08:35,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:08:35,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:08:35,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:08:35,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:08:35,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:08:35,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:08:35,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:08:35,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:08:35,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:08:35,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:08:35,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 16:08:35,233 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:08:35,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:08:35,234 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:08:35,234 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:08:35,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:08:35,235 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:08:35,235 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:08:35,235 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:08:35,235 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:08:35,236 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:08:35,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:08:35,236 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:08:35,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:08:35,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:08:35,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:08:35,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:08:35,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:08:35,238 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:08:35,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:08:35,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:08:35,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:08:35,238 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:08:35,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:08:35,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:08:35,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:08:35,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:08:35,239 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:08:35,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:08:35,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:08:35,240 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:08:35,294 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:08:35,307 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:08:35,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:08:35,312 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:08:35,312 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:08:35,313 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-09-09 16:08:35,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4162cdc1/125797db39664995b59697ea9bacf3a7/FLAG5c432c61b [2019-09-09 16:08:36,147 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:08:36,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-09-09 16:08:36,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4162cdc1/125797db39664995b59697ea9bacf3a7/FLAG5c432c61b [2019-09-09 16:08:36,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4162cdc1/125797db39664995b59697ea9bacf3a7 [2019-09-09 16:08:36,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:08:36,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:08:36,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:08:36,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:08:36,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:08:36,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:08:36" (1/1) ... [2019-09-09 16:08:36,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772df1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:36, skipping insertion in model container [2019-09-09 16:08:36,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:08:36" (1/1) ... [2019-09-09 16:08:36,693 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:08:36,889 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:08:38,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:08:38,339 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:08:38,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:08:38,992 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:08:38,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38 WrapperNode [2019-09-09 16:08:38,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:08:38,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:08:38,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:08:38,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:08:39,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38" (1/1) ... [2019-09-09 16:08:39,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38" (1/1) ... [2019-09-09 16:08:39,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38" (1/1) ... [2019-09-09 16:08:39,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38" (1/1) ... [2019-09-09 16:08:39,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38" (1/1) ... [2019-09-09 16:08:39,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38" (1/1) ... [2019-09-09 16:08:39,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38" (1/1) ... [2019-09-09 16:08:39,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:08:39,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:08:39,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:08:39,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:08:39,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38" (1/1) ... No working directory specified, using /storage/repos/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 [2019-09-09 16:08:39,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:08:39,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:08:39,354 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:08:39,354 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:08:39,354 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:08:39,354 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:08:39,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:08:39,354 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:08:39,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:08:39,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:08:39,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:08:39,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:08:39,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:08:39,357 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:08:39,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:08:39,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:08:39,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:08:44,332 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:08:44,335 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:08:44,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:08:44 BoogieIcfgContainer [2019-09-09 16:08:44,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:08:44,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:08:44,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:08:44,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:08:44,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:08:36" (1/3) ... [2019-09-09 16:08:44,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388c0b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:08:44, skipping insertion in model container [2019-09-09 16:08:44,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:08:38" (2/3) ... [2019-09-09 16:08:44,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388c0b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:08:44, skipping insertion in model container [2019-09-09 16:08:44,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:08:44" (3/3) ... [2019-09-09 16:08:44,355 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label18.c [2019-09-09 16:08:44,369 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:08:44,380 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:08:44,399 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:08:44,432 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:08:44,432 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:08:44,433 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:08:44,433 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:08:44,433 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:08:44,433 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:08:44,433 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:08:44,434 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:08:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 16:08:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-09 16:08:44,503 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:08:44,505 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:08:44,507 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:08:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:08:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1489686398, now seen corresponding path program 1 times [2019-09-09 16:08:44,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:08:44,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:08:44,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:08:44,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:08:44,571 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:08:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:08:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:08:44,922 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:08:44,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 16:08:44,923 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:08:44,929 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 16:08:44,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 16:08:44,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 16:08:44,948 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-09-09 16:08:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:08:50,382 INFO L93 Difference]: Finished difference Result 1610 states and 2915 transitions. [2019-09-09 16:08:50,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 16:08:50,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-09-09 16:08:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:08:50,423 INFO L225 Difference]: With dead ends: 1610 [2019-09-09 16:08:50,423 INFO L226 Difference]: Without dead ends: 1542 [2019-09-09 16:08:50,425 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 16:08:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-09-09 16:08:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-09-09 16:08:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-09-09 16:08:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2822 transitions. [2019-09-09 16:08:50,562 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2822 transitions. Word has length 59 [2019-09-09 16:08:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:08:50,562 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2822 transitions. [2019-09-09 16:08:50,562 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 16:08:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2822 transitions. [2019-09-09 16:08:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-09 16:08:50,569 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:08:50,570 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 16:08:50,570 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:08:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:08:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1403229591, now seen corresponding path program 1 times [2019-09-09 16:08:50,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:08:50,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:08:50,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:08:50,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:08:50,573 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:08:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:08:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:08:50,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:08:50,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 16:08:50,811 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:08:50,813 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 16:08:50,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 16:08:50,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 16:08:50,814 INFO L87 Difference]: Start difference. First operand 1542 states and 2822 transitions. Second operand 5 states. [2019-09-09 16:08:57,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:08:57,535 INFO L93 Difference]: Finished difference Result 2376 states and 4006 transitions. [2019-09-09 16:08:57,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:08:57,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-09-09 16:08:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:08:57,555 INFO L225 Difference]: With dead ends: 2376 [2019-09-09 16:08:57,556 INFO L226 Difference]: Without dead ends: 2376 [2019-09-09 16:08:57,557 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 16:08:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2019-09-09 16:08:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2350. [2019-09-09 16:08:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2350 states. [2019-09-09 16:08:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3968 transitions. [2019-09-09 16:08:57,644 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3968 transitions. Word has length 132 [2019-09-09 16:08:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:08:57,647 INFO L475 AbstractCegarLoop]: Abstraction has 2350 states and 3968 transitions. [2019-09-09 16:08:57,647 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 16:08:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3968 transitions. [2019-09-09 16:08:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-09 16:08:57,659 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:08:57,659 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2019-09-09 16:08:57,661 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:08:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:08:57,661 INFO L82 PathProgramCache]: Analyzing trace with hash -612385541, now seen corresponding path program 1 times [2019-09-09 16:08:57,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:08:57,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:08:57,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:08:57,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:08:57,667 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:08:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:08:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:08:57,866 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:08:57,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:08:57,866 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:08:57,867 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:08:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:08:57,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:08:57,868 INFO L87 Difference]: Start difference. First operand 2350 states and 3968 transitions. Second operand 4 states. [2019-09-09 16:09:05,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:09:05,802 INFO L93 Difference]: Finished difference Result 7016 states and 11462 transitions. [2019-09-09 16:09:05,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:09:05,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-09-09 16:09:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:09:05,845 INFO L225 Difference]: With dead ends: 7016 [2019-09-09 16:09:05,845 INFO L226 Difference]: Without dead ends: 7016 [2019-09-09 16:09:05,846 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:09:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7016 states. [2019-09-09 16:09:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7016 to 7016. [2019-09-09 16:09:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7016 states. [2019-09-09 16:09:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 11462 transitions. [2019-09-09 16:09:06,025 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 11462 transitions. Word has length 134 [2019-09-09 16:09:06,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:09:06,026 INFO L475 AbstractCegarLoop]: Abstraction has 7016 states and 11462 transitions. [2019-09-09 16:09:06,026 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:09:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 11462 transitions. [2019-09-09 16:09:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-09-09 16:09:06,029 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:09:06,029 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2019-09-09 16:09:06,030 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:09:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:09:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1718729302, now seen corresponding path program 1 times [2019-09-09 16:09:06,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:09:06,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:09:06,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:09:06,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:09:06,032 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:09:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:09:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:09:06,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:09:06,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:09:06,159 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:09:06,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:09:06,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:09:06,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:09:06,161 INFO L87 Difference]: Start difference. First operand 7016 states and 11462 transitions. Second operand 6 states. [2019-09-09 16:09:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:09:12,504 INFO L93 Difference]: Finished difference Result 9480 states and 14826 transitions. [2019-09-09 16:09:12,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:09:12,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2019-09-09 16:09:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:09:12,553 INFO L225 Difference]: With dead ends: 9480 [2019-09-09 16:09:12,553 INFO L226 Difference]: Without dead ends: 9480 [2019-09-09 16:09:12,554 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 16:09:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9480 states. [2019-09-09 16:09:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9480 to 9441. [2019-09-09 16:09:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9441 states. [2019-09-09 16:09:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 14632 transitions. [2019-09-09 16:09:12,820 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 14632 transitions. Word has length 161 [2019-09-09 16:09:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:09:12,821 INFO L475 AbstractCegarLoop]: Abstraction has 9441 states and 14632 transitions. [2019-09-09 16:09:12,821 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:09:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 14632 transitions. [2019-09-09 16:09:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-09-09 16:09:12,829 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:09:12,830 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 16:09:12,830 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:09:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:09:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash 531542558, now seen corresponding path program 1 times [2019-09-09 16:09:12,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:09:12,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:09:12,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:09:12,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:09:12,833 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:09:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:09:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 16:09:13,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:09:13,074 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:09:13,075 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 224 with the following transitions: [2019-09-09 16:09:13,080 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2235], [2243], [2247], [2249], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2376], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2448], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 16:09:13,166 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:09:13,167 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 16:09:27,859 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 16:09:27,862 INFO L272 AbstractInterpreter]: Visited 96 different actions 96 times. Never merged. Never widened. Performed 236 root evaluator evaluations with a maximum evaluation depth of 16. Performed 236 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 16:09:27,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:09:27,868 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 16:09:41,798 INFO L227 lantSequenceWeakener]: Weakened 204 states. On average, predicates are now at 75.96% of their original sizes. [2019-09-09 16:09:41,799 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 16:09:41,876 INFO L420 sIntCurrentIteration]: We unified 222 AI predicates to 222 [2019-09-09 16:09:41,876 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 16:09:41,877 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 16:09:41,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 16:09:41,878 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:09:41,878 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 16:09:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 16:09:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 16:09:41,880 INFO L87 Difference]: Start difference. First operand 9441 states and 14632 transitions. Second operand 11 states. [2019-09-09 16:12:29,286 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.