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/Problem13_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:12:57,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:12:57,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:12:57,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:12:57,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:12:57,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:12:57,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:12:57,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:12:57,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:12:57,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:12:57,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:12:57,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:12:57,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:12:57,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:12:57,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:12:57,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:12:57,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:12:57,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:12:57,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:12:57,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:12:57,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:12:57,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:12:57,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:12:57,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:12:57,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:12:57,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:12:57,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:12:57,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:12:57,441 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 17:12:57,466 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:12:57,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:12:57,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:12:57,467 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:12:57,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:12:57,468 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:12:57,469 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:12:57,469 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:12:57,469 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:12:57,469 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:12:57,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:12:57,470 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:12:57,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:12:57,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:12:57,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:12:57,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:12:57,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:12:57,471 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:12:57,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:12:57,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:12:57,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:12:57,472 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:12:57,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:12:57,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:12:57,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:12:57,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:12:57,474 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:12:57,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:12:57,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:12:57,474 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:12:57,527 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:12:57,546 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:12:57,551 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:12:57,553 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:12:57,553 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:12:57,554 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label17.c [2019-09-09 17:12:57,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049be12d5/1b99f450db784887a5ac5dc30f370b4c/FLAG283038aa5 [2019-09-09 17:12:58,400 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:12:58,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label17.c [2019-09-09 17:12:58,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049be12d5/1b99f450db784887a5ac5dc30f370b4c/FLAG283038aa5 [2019-09-09 17:12:58,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049be12d5/1b99f450db784887a5ac5dc30f370b4c [2019-09-09 17:12:58,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:12:58,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:12:58,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:12:58,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:12:58,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:12:58,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:12:58" (1/1) ... [2019-09-09 17:12:58,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa53fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:12:58, skipping insertion in model container [2019-09-09 17:12:58,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:12:58" (1/1) ... [2019-09-09 17:12:58,952 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:12:59,141 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:13:00,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:13:00,696 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:13:01,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:13:01,431 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:13:01,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01 WrapperNode [2019-09-09 17:13:01,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:13:01,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:13:01,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:13:01,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:13:01,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01" (1/1) ... [2019-09-09 17:13:01,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01" (1/1) ... [2019-09-09 17:13:01,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01" (1/1) ... [2019-09-09 17:13:01,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01" (1/1) ... [2019-09-09 17:13:01,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01" (1/1) ... [2019-09-09 17:13:01,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01" (1/1) ... [2019-09-09 17:13:01,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01" (1/1) ... [2019-09-09 17:13:01,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:13:01,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:13:01,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:13:01,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:13:01,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01" (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 17:13:01,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:13:01,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:13:01,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:13:01,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:13:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:13:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:13:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:13:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:13:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:13:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:13:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:13:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:13:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:13:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:13:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:13:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:13:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:13:08,782 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:13:08,782 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:13:08,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:13:08 BoogieIcfgContainer [2019-09-09 17:13:08,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:13:08,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:13:08,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:13:08,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:13:08,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:12:58" (1/3) ... [2019-09-09 17:13:08,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa0590d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:13:08, skipping insertion in model container [2019-09-09 17:13:08,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:01" (2/3) ... [2019-09-09 17:13:08,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa0590d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:13:08, skipping insertion in model container [2019-09-09 17:13:08,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:13:08" (3/3) ... [2019-09-09 17:13:08,805 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label17.c [2019-09-09 17:13:08,817 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:13:08,828 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:13:08,847 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:13:08,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:13:08,880 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:13:08,880 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:13:08,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:13:08,880 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:13:08,881 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:13:08,881 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:13:08,881 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:13:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:13:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-09 17:13:08,949 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:13:08,950 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] [2019-09-09 17:13:08,953 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:13:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:13:08,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1992287976, now seen corresponding path program 1 times [2019-09-09 17:13:08,962 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:13:09,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:09,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:13:09,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:09,020 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:13:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:13:09,368 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 17:13:09,370 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:13:09,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:13:09,371 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:13:09,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:13:09,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:13:09,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:13:09,396 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:13:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:13:15,612 INFO L93 Difference]: Finished difference Result 1971 states and 3470 transitions. [2019-09-09 17:13:15,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:13:15,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-09-09 17:13:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:13:15,650 INFO L225 Difference]: With dead ends: 1971 [2019-09-09 17:13:15,650 INFO L226 Difference]: Without dead ends: 1903 [2019-09-09 17:13:15,652 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 17:13:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2019-09-09 17:13:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1897. [2019-09-09 17:13:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2019-09-09 17:13:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 3341 transitions. [2019-09-09 17:13:15,804 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 3341 transitions. Word has length 39 [2019-09-09 17:13:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:13:15,805 INFO L475 AbstractCegarLoop]: Abstraction has 1897 states and 3341 transitions. [2019-09-09 17:13:15,805 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:13:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 3341 transitions. [2019-09-09 17:13:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-09 17:13:15,810 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:13:15,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:13:15,811 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:13:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:13:15,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1709804397, now seen corresponding path program 1 times [2019-09-09 17:13:15,812 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:13:15,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:15,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:13:15,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:15,814 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:13:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:13:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:13:16,040 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:13:16,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:13:16,040 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:13:16,043 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:13:16,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:13:16,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:13:16,044 INFO L87 Difference]: Start difference. First operand 1897 states and 3341 transitions. Second operand 6 states. [2019-09-09 17:13:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:13:24,066 INFO L93 Difference]: Finished difference Result 3615 states and 5738 transitions. [2019-09-09 17:13:24,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:13:24,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2019-09-09 17:13:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:13:24,092 INFO L225 Difference]: With dead ends: 3615 [2019-09-09 17:13:24,093 INFO L226 Difference]: Without dead ends: 3615 [2019-09-09 17:13:24,094 INFO L628 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 [2019-09-09 17:13:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2019-09-09 17:13:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3586. [2019-09-09 17:13:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3586 states. [2019-09-09 17:13:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5675 transitions. [2019-09-09 17:13:24,245 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5675 transitions. Word has length 115 [2019-09-09 17:13:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:13:24,246 INFO L475 AbstractCegarLoop]: Abstraction has 3586 states and 5675 transitions. [2019-09-09 17:13:24,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:13:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5675 transitions. [2019-09-09 17:13:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-09 17:13:24,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:13:24,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:13:24,250 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:13:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:13:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1473268219, now seen corresponding path program 1 times [2019-09-09 17:13:24,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:13:24,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:24,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:13:24,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:24,253 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:13:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:13:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:13:24,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:13:24,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:13:24,458 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:13:24,459 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:13:24,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:13:24,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:13:24,460 INFO L87 Difference]: Start difference. First operand 3586 states and 5675 transitions. Second operand 6 states. [2019-09-09 17:13:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:13:31,923 INFO L93 Difference]: Finished difference Result 7095 states and 10738 transitions. [2019-09-09 17:13:31,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:13:31,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-09-09 17:13:31,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:13:31,977 INFO L225 Difference]: With dead ends: 7095 [2019-09-09 17:13:31,977 INFO L226 Difference]: Without dead ends: 7095 [2019-09-09 17:13:31,987 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 17:13:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7095 states. [2019-09-09 17:13:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7095 to 7042. [2019-09-09 17:13:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7042 states. [2019-09-09 17:13:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7042 states to 7042 states and 10528 transitions. [2019-09-09 17:13:32,233 INFO L78 Accepts]: Start accepts. Automaton has 7042 states and 10528 transitions. Word has length 134 [2019-09-09 17:13:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:13:32,241 INFO L475 AbstractCegarLoop]: Abstraction has 7042 states and 10528 transitions. [2019-09-09 17:13:32,241 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:13:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 7042 states and 10528 transitions. [2019-09-09 17:13:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-09 17:13:32,252 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:13:32,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:13:32,253 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:13:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:13:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash 421047581, now seen corresponding path program 1 times [2019-09-09 17:13:32,254 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:13:32,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:32,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:13:32,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:32,255 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:13:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:13:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:13:32,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:13:32,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:13:32,554 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:13:32,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:13:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:13:32,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:13:32,556 INFO L87 Difference]: Start difference. First operand 7042 states and 10528 transitions. Second operand 6 states. [2019-09-09 17:13:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:13:41,050 INFO L93 Difference]: Finished difference Result 10950 states and 16422 transitions. [2019-09-09 17:13:41,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:13:41,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2019-09-09 17:13:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:13:41,111 INFO L225 Difference]: With dead ends: 10950 [2019-09-09 17:13:41,112 INFO L226 Difference]: Without dead ends: 10950 [2019-09-09 17:13:41,113 INFO L628 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 [2019-09-09 17:13:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2019-09-09 17:13:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 10780. [2019-09-09 17:13:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10780 states. [2019-09-09 17:13:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10780 states to 10780 states and 15825 transitions. [2019-09-09 17:13:41,382 INFO L78 Accepts]: Start accepts. Automaton has 10780 states and 15825 transitions. Word has length 146 [2019-09-09 17:13:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:13:41,383 INFO L475 AbstractCegarLoop]: Abstraction has 10780 states and 15825 transitions. [2019-09-09 17:13:41,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:13:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 10780 states and 15825 transitions. [2019-09-09 17:13:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-09 17:13:41,389 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:13:41,390 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, 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 17:13:41,391 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:13:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:13:41,391 INFO L82 PathProgramCache]: Analyzing trace with hash -132984160, now seen corresponding path program 1 times [2019-09-09 17:13:41,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:13:41,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:41,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:13:41,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:41,393 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:13:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:13:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 64 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:13:41,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:13:41,579 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:13:41,581 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 210 with the following transitions: [2019-09-09 17:13:41,584 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2847], [2849], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3151], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3245], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:13:41,669 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:13:41,669 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:14:26,800 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:14:26,802 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Performed 141 root evaluator evaluations with a maximum evaluation depth of 17. Performed 141 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:14:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:14:26,807 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:15:10,706 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 71.07% of their original sizes. [2019-09-09 17:15:10,706 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:15:10,747 INFO L420 sIntCurrentIteration]: We unified 208 AI predicates to 208 [2019-09-09 17:15:10,748 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:15:10,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:15:10,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2019-09-09 17:15:10,749 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:15:10,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 17:15:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 17:15:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 17:15:10,751 INFO L87 Difference]: Start difference. First operand 10780 states and 15825 transitions. Second operand 7 states. [2019-09-09 17:17:09,363 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.