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 0.1.24-673a906-m [2019-10-02 20:03:42,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:03:42,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:03:42,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 20:03:42,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 20:03:42,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 20:03:42,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 20:03:42,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 20:03:42,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 20:03:42,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 20:03:42,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 20:03:42,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 20:03:42,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 20:03:42,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 20:03:42,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 20:03:42,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 20:03:42,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 20:03:42,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 20:03:42,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 20:03:42,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 20:03:42,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 20:03:42,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 20:03:42,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 20:03:42,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 20:03:42,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 20:03:42,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 20:03:42,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 20:03:42,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 20:03:42,186 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 [2019-10-02 20:03:42,201 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:03:42,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:03:42,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:03:42,202 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:03:42,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:03:42,203 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:03:42,203 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:03:42,203 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:03:42,203 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:03:42,203 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:03:42,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:03:42,204 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:03:42,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:03:42,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:03:42,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:03:42,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:03:42,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:03:42,205 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:03:42,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:03:42,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:03:42,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:03:42,206 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:03:42,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:03:42,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:03:42,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:03:42,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:03:42,207 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:03:42,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:03:42,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:03:42,208 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:03:42,236 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:03:42,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:03:42,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:03:42,254 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:03:42,255 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:03:42,256 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-10-02 20:03:42,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baafb3089/111349968e9c4d9980a59cd7b8c5e2ce/FLAGa0f15836d [2019-10-02 20:03:43,088 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:03:43,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-10-02 20:03:43,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baafb3089/111349968e9c4d9980a59cd7b8c5e2ce/FLAGa0f15836d [2019-10-02 20:03:43,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baafb3089/111349968e9c4d9980a59cd7b8c5e2ce [2019-10-02 20:03:43,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:03:43,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:03:43,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:03:43,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:03:43,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:03:43,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:03:43" (1/1) ... [2019-10-02 20:03:43,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f30a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:43, skipping insertion in model container [2019-10-02 20:03:43,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:03:43" (1/1) ... [2019-10-02 20:03:43,663 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:03:43,830 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:03:45,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:03:45,296 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:03:46,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:03:46,180 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:03:46,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46 WrapperNode [2019-10-02 20:03:46,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:03:46,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:03:46,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:03:46,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:03:46,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46" (1/1) ... [2019-10-02 20:03:46,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46" (1/1) ... [2019-10-02 20:03:46,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46" (1/1) ... [2019-10-02 20:03:46,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46" (1/1) ... [2019-10-02 20:03:46,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46" (1/1) ... [2019-10-02 20:03:46,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46" (1/1) ... [2019-10-02 20:03:46,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46" (1/1) ... [2019-10-02 20:03:46,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:03:46,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:03:46,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:03:46,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:03:46,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46" (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 [2019-10-02 20:03:46,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:03:46,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:03:46,703 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:03:46,703 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 20:03:46,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 20:03:46,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-02 20:03:46,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:03:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:03:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 20:03:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 20:03:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-02 20:03:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:03:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:03:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:03:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:03:46,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:03:46,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:03:51,943 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:03:51,943 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:03:51,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:03:51 BoogieIcfgContainer [2019-10-02 20:03:51,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:03:51,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:03:51,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:03:51,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:03:51,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:03:43" (1/3) ... [2019-10-02 20:03:51,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c66e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:03:51, skipping insertion in model container [2019-10-02 20:03:51,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:03:46" (2/3) ... [2019-10-02 20:03:51,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c66e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:03:51, skipping insertion in model container [2019-10-02 20:03:51,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:03:51" (3/3) ... [2019-10-02 20:03:51,959 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label18.c [2019-10-02 20:03:51,973 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:03:51,985 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:03:52,007 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:03:52,047 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:03:52,047 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:03:52,047 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:03:52,048 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:03:52,048 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:03:52,048 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:03:52,048 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:03:52,048 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:03:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-02 20:03:52,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-02 20:03:52,109 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:52,111 INFO L411 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] [2019-10-02 20:03:52,114 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:52,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1489686398, now seen corresponding path program 1 times [2019-10-02 20:03:52,123 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:52,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:52,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:52,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:52,185 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:03:52,564 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:52,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 20:03:52,564 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:52,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 20:03:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 20:03:52,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:03:52,589 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-02 20:03:58,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:03:58,132 INFO L93 Difference]: Finished difference Result 1610 states and 2915 transitions. [2019-10-02 20:03:58,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 20:03:58,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-10-02 20:03:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:03:58,174 INFO L225 Difference]: With dead ends: 1610 [2019-10-02 20:03:58,175 INFO L226 Difference]: Without dead ends: 1542 [2019-10-02 20:03:58,176 INFO L640 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 [2019-10-02 20:03:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-02 20:03:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-02 20:03:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-02 20:03:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2822 transitions. [2019-10-02 20:03:58,332 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2822 transitions. Word has length 59 [2019-10-02 20:03:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:03:58,333 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2822 transitions. [2019-10-02 20:03:58,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 20:03:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2822 transitions. [2019-10-02 20:03:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-02 20:03:58,346 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:03:58,347 INFO L411 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] [2019-10-02 20:03:58,348 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:03:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:03:58,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1403229591, now seen corresponding path program 1 times [2019-10-02 20:03:58,350 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:03:58,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:58,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:03:58,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:03:58,354 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:03:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:03:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:03:58,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:03:58,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:03:58,636 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:03:58,638 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:03:58,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:03:58,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:03:58,639 INFO L87 Difference]: Start difference. First operand 1542 states and 2822 transitions. Second operand 5 states. [2019-10-02 20:04:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:04:05,241 INFO L93 Difference]: Finished difference Result 2376 states and 4006 transitions. [2019-10-02 20:04:05,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:04:05,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-02 20:04:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:04:05,261 INFO L225 Difference]: With dead ends: 2376 [2019-10-02 20:04:05,262 INFO L226 Difference]: Without dead ends: 2376 [2019-10-02 20:04:05,266 INFO L640 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 [2019-10-02 20:04:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2019-10-02 20:04:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2350. [2019-10-02 20:04:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2350 states. [2019-10-02 20:04:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3968 transitions. [2019-10-02 20:04:05,344 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3968 transitions. Word has length 132 [2019-10-02 20:04:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:04:05,347 INFO L475 AbstractCegarLoop]: Abstraction has 2350 states and 3968 transitions. [2019-10-02 20:04:05,347 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:04:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3968 transitions. [2019-10-02 20:04:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-02 20:04:05,357 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:04:05,357 INFO L411 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] [2019-10-02 20:04:05,358 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:04:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:05,358 INFO L82 PathProgramCache]: Analyzing trace with hash -612385541, now seen corresponding path program 1 times [2019-10-02 20:04:05,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:04:05,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:05,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:04:05,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:05,364 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:04:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:04:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:04:05,538 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:04:05,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:04:05,538 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:04:05,541 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:04:05,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:04:05,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:04:05,542 INFO L87 Difference]: Start difference. First operand 2350 states and 3968 transitions. Second operand 4 states. [2019-10-02 20:04:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:04:13,489 INFO L93 Difference]: Finished difference Result 7016 states and 11462 transitions. [2019-10-02 20:04:13,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:04:13,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-10-02 20:04:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:04:13,532 INFO L225 Difference]: With dead ends: 7016 [2019-10-02 20:04:13,533 INFO L226 Difference]: Without dead ends: 7016 [2019-10-02 20:04:13,533 INFO L640 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 [2019-10-02 20:04:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7016 states. [2019-10-02 20:04:13,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7016 to 7016. [2019-10-02 20:04:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7016 states. [2019-10-02 20:04:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 11462 transitions. [2019-10-02 20:04:13,709 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 11462 transitions. Word has length 134 [2019-10-02 20:04:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:04:13,709 INFO L475 AbstractCegarLoop]: Abstraction has 7016 states and 11462 transitions. [2019-10-02 20:04:13,710 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:04:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 11462 transitions. [2019-10-02 20:04:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-02 20:04:13,714 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:04:13,714 INFO L411 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] [2019-10-02 20:04:13,714 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:04:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1718729302, now seen corresponding path program 1 times [2019-10-02 20:04:13,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:04:13,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:13,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:04:13,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:13,717 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:04:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:04:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:04:13,856 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:04:13,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:04:13,857 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:04:13,857 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:04:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:04:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:04:13,858 INFO L87 Difference]: Start difference. First operand 7016 states and 11462 transitions. Second operand 6 states. [2019-10-02 20:04:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:04:20,247 INFO L93 Difference]: Finished difference Result 9480 states and 14826 transitions. [2019-10-02 20:04:20,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:04:20,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2019-10-02 20:04:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:04:20,300 INFO L225 Difference]: With dead ends: 9480 [2019-10-02 20:04:20,300 INFO L226 Difference]: Without dead ends: 9480 [2019-10-02 20:04:20,301 INFO L640 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 [2019-10-02 20:04:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9480 states. [2019-10-02 20:04:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9480 to 9441. [2019-10-02 20:04:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9441 states. [2019-10-02 20:04:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 14632 transitions. [2019-10-02 20:04:20,529 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 14632 transitions. Word has length 161 [2019-10-02 20:04:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:04:20,530 INFO L475 AbstractCegarLoop]: Abstraction has 9441 states and 14632 transitions. [2019-10-02 20:04:20,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:04:20,530 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 14632 transitions. [2019-10-02 20:04:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-10-02 20:04:20,537 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:04:20,538 INFO L411 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] [2019-10-02 20:04:20,538 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:04:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:20,538 INFO L82 PathProgramCache]: Analyzing trace with hash 531542558, now seen corresponding path program 1 times [2019-10-02 20:04:20,539 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:04:20,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:20,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:04:20,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:04:20,540 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:04:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:04:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:04:20,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:04:20,784 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:04:20,785 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 224 with the following transitions: [2019-10-02 20:04:20,788 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] [2019-10-02 20:04:20,879 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:04:20,879 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:04:35,495 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:04:35,498 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. [2019-10-02 20:04:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:04:35,503 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:04:49,460 INFO L227 lantSequenceWeakener]: Weakened 204 states. On average, predicates are now at 75.96% of their original sizes. [2019-10-02 20:04:49,460 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:04:49,566 INFO L420 sIntCurrentIteration]: We unified 222 AI predicates to 222 [2019-10-02 20:04:49,566 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:04:49,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:04:49,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-10-02 20:04:49,568 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:04:49,572 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 20:04:49,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 20:04:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-02 20:04:49,574 INFO L87 Difference]: Start difference. First operand 9441 states and 14632 transitions. Second operand 11 states. [2019-10-02 20:07:32,701 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.