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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:14:47,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:14:47,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:14:47,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:14:47,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:14:47,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:14:47,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:14:47,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:14:47,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:14:47,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:14:47,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:14:47,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:14:47,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:14:47,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:14:47,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:14:47,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:14:47,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:14:47,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:14:47,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:14:47,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:14:47,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:14:47,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:14:47,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:14:47,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:14:47,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:14:47,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:14:47,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:14:47,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:14:47,362 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 17:14:47,377 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:14:47,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:14:47,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:14:47,378 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:14:47,379 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:14:47,379 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:14:47,379 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:14:47,379 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:14:47,380 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:14:47,380 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:14:47,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:14:47,381 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:14:47,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:14:47,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:14:47,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:14:47,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:14:47,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:14:47,382 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:14:47,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:14:47,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:14:47,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:14:47,383 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:14:47,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:14:47,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:14:47,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:14:47,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:14:47,384 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:14:47,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:14:47,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:14:47,386 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:14:47,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:14:47,433 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:14:47,437 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:14:47,438 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:14:47,438 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:14:47,439 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-09-09 17:14:47,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6657cd95/65ab4fdb0e9a4a10b305fda54e64021b/FLAG4f3711eea [2019-09-09 17:14:48,366 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:14:48,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-09-09 17:14:48,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6657cd95/65ab4fdb0e9a4a10b305fda54e64021b/FLAG4f3711eea [2019-09-09 17:14:48,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6657cd95/65ab4fdb0e9a4a10b305fda54e64021b [2019-09-09 17:14:48,840 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:14:48,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:14:48,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:14:48,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:14:48,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:14:48,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:14:48" (1/1) ... [2019-09-09 17:14:48,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f766b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:48, skipping insertion in model container [2019-09-09 17:14:48,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:14:48" (1/1) ... [2019-09-09 17:14:48,860 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:14:49,054 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:14:50,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:14:50,705 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:14:51,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:14:51,470 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:14:51,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51 WrapperNode [2019-09-09 17:14:51,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:14:51,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:14:51,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:14:51,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:14:51,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51" (1/1) ... [2019-09-09 17:14:51,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51" (1/1) ... [2019-09-09 17:14:51,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51" (1/1) ... [2019-09-09 17:14:51,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51" (1/1) ... [2019-09-09 17:14:51,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51" (1/1) ... [2019-09-09 17:14:51,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51" (1/1) ... [2019-09-09 17:14:51,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51" (1/1) ... [2019-09-09 17:14:51,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:14:51,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:14:51,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:14:51,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:14:51,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51" (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 17:14:51,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:14:51,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:14:51,990 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:14:51,990 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:14:51,991 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:14:51,991 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:14:51,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:14:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:14:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:14:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:14:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:14:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:14:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:14:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:14:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:14:51,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:14:51,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:14:57,686 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:14:57,687 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:14:57,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:14:57 BoogieIcfgContainer [2019-09-09 17:14:57,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:14:57,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:14:57,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:14:57,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:14:57,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:14:48" (1/3) ... [2019-09-09 17:14:57,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362eeff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:14:57, skipping insertion in model container [2019-09-09 17:14:57,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:14:51" (2/3) ... [2019-09-09 17:14:57,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362eeff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:14:57, skipping insertion in model container [2019-09-09 17:14:57,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:14:57" (3/3) ... [2019-09-09 17:14:57,698 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2019-09-09 17:14:57,708 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:14:57,717 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:14:57,734 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:14:57,761 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:14:57,761 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:14:57,762 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:14:57,762 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:14:57,762 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:14:57,762 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:14:57,762 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:14:57,763 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:14:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:14:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-09 17:14:57,814 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:14:57,816 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:14:57,818 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:14:57,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:14:57,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1527050992, now seen corresponding path program 1 times [2019-09-09 17:14:57,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:14:57,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:57,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:14:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:57,880 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:14:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:14:58,265 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 17:14:58,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:14:58,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:14:58,269 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:14:58,274 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:14:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:14:58,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:14:58,292 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-09-09 17:15:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:15:08,187 INFO L93 Difference]: Finished difference Result 2851 states and 4840 transitions. [2019-09-09 17:15:08,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:15:08,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-09-09 17:15:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:15:08,232 INFO L225 Difference]: With dead ends: 2851 [2019-09-09 17:15:08,233 INFO L226 Difference]: Without dead ends: 2758 [2019-09-09 17:15:08,235 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:15:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2019-09-09 17:15:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1919. [2019-09-09 17:15:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1919 states. [2019-09-09 17:15:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 3313 transitions. [2019-09-09 17:15:08,382 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 3313 transitions. Word has length 61 [2019-09-09 17:15:08,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:15:08,383 INFO L475 AbstractCegarLoop]: Abstraction has 1919 states and 3313 transitions. [2019-09-09 17:15:08,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:15:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 3313 transitions. [2019-09-09 17:15:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-09 17:15:08,389 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:15:08,389 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:15:08,390 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:15:08,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:15:08,390 INFO L82 PathProgramCache]: Analyzing trace with hash 430477289, now seen corresponding path program 1 times [2019-09-09 17:15:08,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:15:08,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:08,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:15:08,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:08,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:15:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:15:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:15:08,646 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:15:08,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:15:08,647 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:15:08,649 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:15:08,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:15:08,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:15:08,650 INFO L87 Difference]: Start difference. First operand 1919 states and 3313 transitions. Second operand 5 states. [2019-09-09 17:15:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:15:18,505 INFO L93 Difference]: Finished difference Result 3632 states and 5664 transitions. [2019-09-09 17:15:18,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:15:18,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-09-09 17:15:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:15:18,527 INFO L225 Difference]: With dead ends: 3632 [2019-09-09 17:15:18,527 INFO L226 Difference]: Without dead ends: 3632 [2019-09-09 17:15:18,528 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:15:18,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2019-09-09 17:15:18,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3623. [2019-09-09 17:15:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3623 states. [2019-09-09 17:15:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 5644 transitions. [2019-09-09 17:15:18,622 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 5644 transitions. Word has length 130 [2019-09-09 17:15:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:15:18,622 INFO L475 AbstractCegarLoop]: Abstraction has 3623 states and 5644 transitions. [2019-09-09 17:15:18,623 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:15:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 5644 transitions. [2019-09-09 17:15:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-09 17:15:18,634 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:15:18,634 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:15:18,635 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:15:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:15:18,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1084274893, now seen corresponding path program 1 times [2019-09-09 17:15:18,636 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:15:18,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:18,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:15:18,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:18,638 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:15:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:15:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:15:18,779 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:15:18,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:15:18,780 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:15:18,780 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:15:18,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:15:18,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:15:18,781 INFO L87 Difference]: Start difference. First operand 3623 states and 5644 transitions. Second operand 5 states. [2019-09-09 17:15:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:15:27,365 INFO L93 Difference]: Finished difference Result 7191 states and 10294 transitions. [2019-09-09 17:15:27,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:15:27,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-09-09 17:15:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:15:27,397 INFO L225 Difference]: With dead ends: 7191 [2019-09-09 17:15:27,397 INFO L226 Difference]: Without dead ends: 7191 [2019-09-09 17:15:27,406 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:15:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7191 states. [2019-09-09 17:15:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7191 to 7086. [2019-09-09 17:15:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7086 states. [2019-09-09 17:15:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7086 states to 7086 states and 10105 transitions. [2019-09-09 17:15:27,616 INFO L78 Accepts]: Start accepts. Automaton has 7086 states and 10105 transitions. Word has length 132 [2019-09-09 17:15:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:15:27,618 INFO L475 AbstractCegarLoop]: Abstraction has 7086 states and 10105 transitions. [2019-09-09 17:15:27,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:15:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 7086 states and 10105 transitions. [2019-09-09 17:15:27,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-09 17:15:27,626 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:15:27,627 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:15:27,627 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:15:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:15:27,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1000697413, now seen corresponding path program 1 times [2019-09-09 17:15:27,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:15:27,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:27,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:15:27,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:27,629 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:15:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:15:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:15:27,805 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:15:27,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:15:27,806 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:15:27,806 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:15:27,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:15:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:15:27,807 INFO L87 Difference]: Start difference. First operand 7086 states and 10105 transitions. Second operand 3 states. [2019-09-09 17:15:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:15:33,279 INFO L93 Difference]: Finished difference Result 13737 states and 18740 transitions. [2019-09-09 17:15:33,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:15:33,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2019-09-09 17:15:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:15:33,341 INFO L225 Difference]: With dead ends: 13737 [2019-09-09 17:15:33,341 INFO L226 Difference]: Without dead ends: 13737 [2019-09-09 17:15:33,342 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:15:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13737 states. [2019-09-09 17:15:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13737 to 13728. [2019-09-09 17:15:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13728 states. [2019-09-09 17:15:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13728 states to 13728 states and 18716 transitions. [2019-09-09 17:15:33,642 INFO L78 Accepts]: Start accepts. Automaton has 13728 states and 18716 transitions. Word has length 176 [2019-09-09 17:15:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:15:33,644 INFO L475 AbstractCegarLoop]: Abstraction has 13728 states and 18716 transitions. [2019-09-09 17:15:33,644 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:15:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 13728 states and 18716 transitions. [2019-09-09 17:15:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-09 17:15:33,648 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:15:33,648 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:15:33,648 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:15:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:15:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2141049635, now seen corresponding path program 1 times [2019-09-09 17:15:33,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:15:33,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:33,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:15:33,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:33,650 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:15:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:15:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:15:33,892 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:15:33,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:15:33,893 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:15:33,893 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:15:33,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:15:33,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:15:33,894 INFO L87 Difference]: Start difference. First operand 13728 states and 18716 transitions. Second operand 4 states. [2019-09-09 17:15:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:15:41,512 INFO L93 Difference]: Finished difference Result 17760 states and 21748 transitions. [2019-09-09 17:15:41,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:15:41,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2019-09-09 17:15:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:15:41,574 INFO L225 Difference]: With dead ends: 17760 [2019-09-09 17:15:41,574 INFO L226 Difference]: Without dead ends: 17760 [2019-09-09 17:15:41,575 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:15:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17760 states. [2019-09-09 17:15:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17760 to 16956. [2019-09-09 17:15:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16956 states. [2019-09-09 17:15:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16956 states to 16956 states and 20837 transitions. [2019-09-09 17:15:41,911 INFO L78 Accepts]: Start accepts. Automaton has 16956 states and 20837 transitions. Word has length 181 [2019-09-09 17:15:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:15:41,912 INFO L475 AbstractCegarLoop]: Abstraction has 16956 states and 20837 transitions. [2019-09-09 17:15:41,912 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:15:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 16956 states and 20837 transitions. [2019-09-09 17:15:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-09-09 17:15:41,919 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:15:41,919 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-09-09 17:15:41,920 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:15:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:15:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash -293318598, now seen corresponding path program 1 times [2019-09-09 17:15:41,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:15:41,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:41,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:15:41,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:15:41,925 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:15:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:15:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:15:42,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:15:42,349 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:15:42,350 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 251 with the following transitions: [2019-09-09 17:15:42,353 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], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2971], [2979], [2987], [2995], [3003], [3011], [3019], [3023], [3025], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3120], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3361], [3365], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:15:42,459 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:15:42,460 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:16:46,978 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:16:46,980 INFO L272 AbstractInterpreter]: Visited 123 different actions 123 times. Never merged. Never widened. Performed 164 root evaluator evaluations with a maximum evaluation depth of 17. Performed 164 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:16:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:16:46,985 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:17:44,578 INFO L227 lantSequenceWeakener]: Weakened 239 states. On average, predicates are now at 71.42% of their original sizes. [2019-09-09 17:17:44,578 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:17:44,630 INFO L420 sIntCurrentIteration]: We unified 249 AI predicates to 249 [2019-09-09 17:17:44,630 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:17:44,631 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:17:44,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:17:44,632 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:17:44,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:17:44,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:17:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:17:44,633 INFO L87 Difference]: Start difference. First operand 16956 states and 20837 transitions. Second operand 8 states. [2019-09-09 17:20:03,967 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.