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/Problem16_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:18:47,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:18:47,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:18:47,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 21:18:47,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:18:47,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:18:47,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:18:47,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:18:47,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:18:47,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:18:47,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:18:47,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:18:47,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:18:47,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:18:47,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:18:47,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:18:47,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:18:47,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 21:18:47,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 21:18:47,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 21:18:47,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 21:18:47,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 21:18:47,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 21:18:47,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 21:18:47,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 21:18:47,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 21:18:47,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 21:18:47,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 21:18:47,166 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 21:18:47,188 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:18:47,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:18:47,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:18:47,190 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:18:47,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:18:47,191 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:18:47,191 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:18:47,191 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:18:47,191 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:18:47,192 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:18:47,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:18:47,194 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:18:47,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:18:47,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:18:47,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:18:47,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:18:47,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:18:47,195 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:18:47,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:18:47,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:18:47,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:18:47,196 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:18:47,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:18:47,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:18:47,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:18:47,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:18:47,197 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:18:47,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:18:47,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:18:47,198 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:18:47,231 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:18:47,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:18:47,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:18:47,249 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:18:47,250 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:18:47,251 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-10-02 21:18:47,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a4261f3/14eae567df3d497781ba1abc216befa3/FLAG065bd67a5 [2019-10-02 21:18:47,977 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:18:47,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-10-02 21:18:48,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a4261f3/14eae567df3d497781ba1abc216befa3/FLAG065bd67a5 [2019-10-02 21:18:48,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a4261f3/14eae567df3d497781ba1abc216befa3 [2019-10-02 21:18:48,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:18:48,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:18:48,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:18:48,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:18:48,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:18:48,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:18:48" (1/1) ... [2019-10-02 21:18:48,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e48f3f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:48, skipping insertion in model container [2019-10-02 21:18:48,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:18:48" (1/1) ... [2019-10-02 21:18:48,159 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:18:48,247 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:18:49,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:18:49,008 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:18:49,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:18:49,378 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:18:49,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49 WrapperNode [2019-10-02 21:18:49,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:18:49,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:18:49,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:18:49,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:18:49,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49" (1/1) ... [2019-10-02 21:18:49,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49" (1/1) ... [2019-10-02 21:18:49,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49" (1/1) ... [2019-10-02 21:18:49,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49" (1/1) ... [2019-10-02 21:18:49,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49" (1/1) ... [2019-10-02 21:18:49,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49" (1/1) ... [2019-10-02 21:18:49,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49" (1/1) ... [2019-10-02 21:18:49,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:18:49,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:18:49,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:18:49,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:18:49,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49" (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 21:18:49,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:18:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:18:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:18:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:18:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:18:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:18:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:18:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:18:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:18:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:18:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:18:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:18:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:18:52,107 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:18:52,107 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:18:52,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:18:52 BoogieIcfgContainer [2019-10-02 21:18:52,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:18:52,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:18:52,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:18:52,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:18:52,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:18:48" (1/3) ... [2019-10-02 21:18:52,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd78265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:18:52, skipping insertion in model container [2019-10-02 21:18:52,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:18:49" (2/3) ... [2019-10-02 21:18:52,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd78265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:18:52, skipping insertion in model container [2019-10-02 21:18:52,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:18:52" (3/3) ... [2019-10-02 21:18:52,123 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label11.c [2019-10-02 21:18:52,135 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:18:52,152 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:18:52,171 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:18:52,216 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:18:52,216 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:18:52,216 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:18:52,216 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:18:52,216 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:18:52,217 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:18:52,217 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:18:52,217 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:18:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-02 21:18:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 21:18:52,277 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:18:52,278 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, 1, 1] [2019-10-02 21:18:52,281 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:18:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:18:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1003051062, now seen corresponding path program 1 times [2019-10-02 21:18:52,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:18:52,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:18:52,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:18:52,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:18:52,356 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:18:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:18:52,719 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 21:18:52,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:18:52,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 21:18:52,722 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:18:52,729 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 21:18:52,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 21:18:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:18:52,747 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-02 21:18:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:18:55,142 INFO L93 Difference]: Finished difference Result 750 states and 1301 transitions. [2019-10-02 21:18:55,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 21:18:55,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-10-02 21:18:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:18:55,185 INFO L225 Difference]: With dead ends: 750 [2019-10-02 21:18:55,185 INFO L226 Difference]: Without dead ends: 682 [2019-10-02 21:18:55,188 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 21:18:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-02 21:18:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-02 21:18:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-02 21:18:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-10-02 21:18:55,289 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 61 [2019-10-02 21:18:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:18:55,289 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-10-02 21:18:55,290 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 21:18:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-10-02 21:18:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-02 21:18:55,296 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:18:55,296 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, 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] [2019-10-02 21:18:55,297 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:18:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:18:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1399533719, now seen corresponding path program 1 times [2019-10-02 21:18:55,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:18:55,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:18:55,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:18:55,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:18:55,300 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:18:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:18:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:18:55,462 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:18:55,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 21:18:55,463 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:18:55,465 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 21:18:55,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 21:18:55,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:18:55,466 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-10-02 21:18:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:18:58,445 INFO L93 Difference]: Finished difference Result 1390 states and 2310 transitions. [2019-10-02 21:18:58,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:18:58,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-02 21:18:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:18:58,459 INFO L225 Difference]: With dead ends: 1390 [2019-10-02 21:18:58,459 INFO L226 Difference]: Without dead ends: 1390 [2019-10-02 21:18:58,460 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 21:18:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-10-02 21:18:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-10-02 21:18:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-10-02 21:18:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-10-02 21:18:58,525 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 130 [2019-10-02 21:18:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:18:58,528 INFO L475 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-10-02 21:18:58,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 21:18:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-10-02 21:18:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-02 21:18:58,541 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:18:58,541 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, 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] [2019-10-02 21:18:58,542 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:18:58,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:18:58,542 INFO L82 PathProgramCache]: Analyzing trace with hash -32887422, now seen corresponding path program 1 times [2019-10-02 21:18:58,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:18:58,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:18:58,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:18:58,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:18:58,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:18:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:18:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:18:58,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:18:58,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:18:58,745 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:18:58,746 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:18:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:18:58,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:18:58,747 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-10-02 21:19:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:19:01,851 INFO L93 Difference]: Finished difference Result 2106 states and 3333 transitions. [2019-10-02 21:19:01,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:19:01,852 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-10-02 21:19:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:19:01,872 INFO L225 Difference]: With dead ends: 2106 [2019-10-02 21:19:01,873 INFO L226 Difference]: Without dead ends: 2106 [2019-10-02 21:19:01,878 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 21:19:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-02 21:19:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-10-02 21:19:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-02 21:19:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-10-02 21:19:01,974 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 159 [2019-10-02 21:19:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:19:01,977 INFO L475 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-10-02 21:19:01,977 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:19:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-10-02 21:19:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-02 21:19:01,983 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:19:01,983 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:19:01,983 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:19:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:19:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash -909637690, now seen corresponding path program 1 times [2019-10-02 21:19:01,984 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:19:01,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:19:01,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:19:01,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:19:01,988 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:19:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:19:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:19:02,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:19:02,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:19:02,273 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:19:02,274 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:19:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:19:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:19:02,275 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-10-02 21:19:04,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:19:04,597 INFO L93 Difference]: Finished difference Result 3166 states and 4200 transitions. [2019-10-02 21:19:04,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:19:04,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2019-10-02 21:19:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:19:04,623 INFO L225 Difference]: With dead ends: 3166 [2019-10-02 21:19:04,623 INFO L226 Difference]: Without dead ends: 3166 [2019-10-02 21:19:04,624 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 21:19:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-10-02 21:19:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-10-02 21:19:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-10-02 21:19:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-10-02 21:19:04,747 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 177 [2019-10-02 21:19:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:19:04,748 INFO L475 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-10-02 21:19:04,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:19:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-10-02 21:19:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-02 21:19:04,752 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:19:04,754 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, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:19:04,754 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:19:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:19:04,755 INFO L82 PathProgramCache]: Analyzing trace with hash -81123022, now seen corresponding path program 1 times [2019-10-02 21:19:04,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:19:04,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:19:04,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:19:04,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:19:04,756 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:19:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:19:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 120 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 21:19:04,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:19:04,997 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:19:04,998 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2019-10-02 21:19:05,000 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [575], [577], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-10-02 21:19:05,084 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:19:05,085 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:19:13,858 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:19:13,861 INFO L272 AbstractInterpreter]: Visited 134 different actions 134 times. Never merged. Never widened. Performed 305 root evaluator evaluations with a maximum evaluation depth of 14. Performed 305 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 21:19:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:19:13,865 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:19:20,625 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 78.21% of their original sizes. [2019-10-02 21:19:20,626 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:19:20,744 INFO L420 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2019-10-02 21:19:20,744 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:19:20,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:19:20,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2019-10-02 21:19:20,746 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:19:20,747 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 21:19:20,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 21:19:20,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-02 21:19:20,748 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 12 states. [2019-10-02 21:19:41,592 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.