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/Problem14_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:11:57,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:11:57,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:11:57,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:11:57,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:11:57,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:11:57,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:11:57,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:11:57,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:11:57,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:11:57,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:11:57,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:11:57,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:11:57,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:11:57,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:11:57,960 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 18:11:57,976 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:11:57,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:11:57,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:11:57,977 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:11:57,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:11:57,977 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:11:57,978 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:11:57,978 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:11:57,978 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:11:57,978 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:11:57,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:11:57,979 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:11:57,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:11:57,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:11:57,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:11:57,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:11:57,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:11:57,980 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:11:57,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:11:57,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:11:57,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:11:57,981 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:11:57,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:11:57,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:11:57,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:11:57,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:11:57,982 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:11:57,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:11:57,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:11:57,983 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:11:58,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:11:58,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:11:58,027 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:11:58,028 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:11:58,028 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:11:58,029 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label19.c [2019-09-09 18:11:58,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3daa1d7b1/12175d042cf74d1f9de78adea4582f57/FLAGd54d19a13 [2019-09-09 18:11:58,639 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:11:58,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label19.c [2019-09-09 18:11:58,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3daa1d7b1/12175d042cf74d1f9de78adea4582f57/FLAGd54d19a13 [2019-09-09 18:11:58,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3daa1d7b1/12175d042cf74d1f9de78adea4582f57 [2019-09-09 18:11:58,869 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:11:58,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:11:58,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:11:58,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:11:58,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:11:58,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:11:58" (1/1) ... [2019-09-09 18:11:58,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6d7b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:58, skipping insertion in model container [2019-09-09 18:11:58,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:11:58" (1/1) ... [2019-09-09 18:11:58,888 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:11:58,952 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:11:59,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:11:59,590 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:11:59,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:11:59,876 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:11:59,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59 WrapperNode [2019-09-09 18:11:59,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:11:59,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:11:59,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:11:59,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:11:59,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59" (1/1) ... [2019-09-09 18:11:59,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59" (1/1) ... [2019-09-09 18:11:59,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59" (1/1) ... [2019-09-09 18:11:59,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59" (1/1) ... [2019-09-09 18:12:00,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59" (1/1) ... [2019-09-09 18:12:00,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59" (1/1) ... [2019-09-09 18:12:00,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59" (1/1) ... [2019-09-09 18:12:00,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:12:00,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:12:00,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:12:00,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:12:00,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59" (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 18:12:00,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:12:00,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:12:00,181 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:12:00,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:12:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:12:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:12:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:12:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:12:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:12:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:12:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:12:01,624 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:12:01,624 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:12:01,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:12:01 BoogieIcfgContainer [2019-09-09 18:12:01,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:12:01,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:12:01,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:12:01,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:12:01,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:11:58" (1/3) ... [2019-09-09 18:12:01,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583194e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:12:01, skipping insertion in model container [2019-09-09 18:12:01,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:11:59" (2/3) ... [2019-09-09 18:12:01,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583194e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:12:01, skipping insertion in model container [2019-09-09 18:12:01,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:12:01" (3/3) ... [2019-09-09 18:12:01,651 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label19.c [2019-09-09 18:12:01,662 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:12:01,671 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:12:01,689 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:12:01,719 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:12:01,720 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:12:01,720 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:12:01,720 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:12:01,720 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:12:01,721 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:12:01,721 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:12:01,721 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:12:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:12:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-09 18:12:01,777 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:12:01,778 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, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:12:01,780 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:12:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:12:01,789 INFO L82 PathProgramCache]: Analyzing trace with hash -370104541, now seen corresponding path program 1 times [2019-09-09 18:12:01,792 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:12:01,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:01,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:12:01,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:01,846 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:12:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:12:02,227 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 18:12:02,229 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:12:02,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:12:02,230 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:12:02,236 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:12:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:12:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:12:02,254 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-09-09 18:12:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:12:03,421 INFO L93 Difference]: Finished difference Result 440 states and 718 transitions. [2019-09-09 18:12:03,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:12:03,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2019-09-09 18:12:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:12:03,456 INFO L225 Difference]: With dead ends: 440 [2019-09-09 18:12:03,457 INFO L226 Difference]: Without dead ends: 372 [2019-09-09 18:12:03,460 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 18:12:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-09-09 18:12:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-09-09 18:12:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:12:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-09-09 18:12:03,596 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 68 [2019-09-09 18:12:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:12:03,597 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-09-09 18:12:03,597 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:12:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-09-09 18:12:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-09 18:12:03,610 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:12:03,610 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:12:03,611 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:12:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:12:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash -115709203, now seen corresponding path program 1 times [2019-09-09 18:12:03,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:12:03,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:03,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:12:03,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:03,615 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:12:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:12:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:12:03,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:12:03,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:12:03,842 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:12:03,844 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:12:03,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:12:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:12:03,845 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-09-09 18:12:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:12:05,190 INFO L93 Difference]: Finished difference Result 570 states and 887 transitions. [2019-09-09 18:12:05,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 18:12:05,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-09-09 18:12:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:12:05,196 INFO L225 Difference]: With dead ends: 570 [2019-09-09 18:12:05,196 INFO L226 Difference]: Without dead ends: 570 [2019-09-09 18:12:05,197 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 18:12:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-09-09 18:12:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 564. [2019-09-09 18:12:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2019-09-09 18:12:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 877 transitions. [2019-09-09 18:12:05,247 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 877 transitions. Word has length 137 [2019-09-09 18:12:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:12:05,248 INFO L475 AbstractCegarLoop]: Abstraction has 564 states and 877 transitions. [2019-09-09 18:12:05,248 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:12:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 877 transitions. [2019-09-09 18:12:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-09 18:12:05,250 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:12:05,250 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, 2, 2, 2, 2, 2, 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] [2019-09-09 18:12:05,251 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:12:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:12:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1811598022, now seen corresponding path program 1 times [2019-09-09 18:12:05,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:12:05,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:05,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:12:05,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:05,253 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:12:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:12:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:12:05,368 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:12:05,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 18:12:05,369 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:12:05,371 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 18:12:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 18:12:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 18:12:05,372 INFO L87 Difference]: Start difference. First operand 564 states and 877 transitions. Second operand 5 states. [2019-09-09 18:12:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:12:06,702 INFO L93 Difference]: Finished difference Result 1156 states and 1719 transitions. [2019-09-09 18:12:06,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 18:12:06,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2019-09-09 18:12:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:12:06,718 INFO L225 Difference]: With dead ends: 1156 [2019-09-09 18:12:06,718 INFO L226 Difference]: Without dead ends: 1156 [2019-09-09 18:12:06,719 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 18:12:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2019-09-09 18:12:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1136. [2019-09-09 18:12:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1136 states. [2019-09-09 18:12:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1659 transitions. [2019-09-09 18:12:06,778 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1659 transitions. Word has length 138 [2019-09-09 18:12:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:12:06,779 INFO L475 AbstractCegarLoop]: Abstraction has 1136 states and 1659 transitions. [2019-09-09 18:12:06,779 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 18:12:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1659 transitions. [2019-09-09 18:12:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-09 18:12:06,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:12:06,781 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, 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] [2019-09-09 18:12:06,781 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:12:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:12:06,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1374708642, now seen corresponding path program 1 times [2019-09-09 18:12:06,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:12:06,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:06,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:12:06,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:06,785 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:12:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:12:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:12:06,941 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:12:06,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 18:12:06,942 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:12:06,943 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 18:12:06,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 18:12:06,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 18:12:06,943 INFO L87 Difference]: Start difference. First operand 1136 states and 1659 transitions. Second operand 5 states. [2019-09-09 18:12:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:12:08,236 INFO L93 Difference]: Finished difference Result 1748 states and 2450 transitions. [2019-09-09 18:12:08,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 18:12:08,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2019-09-09 18:12:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:12:08,247 INFO L225 Difference]: With dead ends: 1748 [2019-09-09 18:12:08,247 INFO L226 Difference]: Without dead ends: 1748 [2019-09-09 18:12:08,247 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 18:12:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2019-09-09 18:12:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1520. [2019-09-09 18:12:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1520 states. [2019-09-09 18:12:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2133 transitions. [2019-09-09 18:12:08,296 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2133 transitions. Word has length 140 [2019-09-09 18:12:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:12:08,297 INFO L475 AbstractCegarLoop]: Abstraction has 1520 states and 2133 transitions. [2019-09-09 18:12:08,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 18:12:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2133 transitions. [2019-09-09 18:12:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 18:12:08,299 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:12:08,299 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, 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] [2019-09-09 18:12:08,299 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:12:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:12:08,300 INFO L82 PathProgramCache]: Analyzing trace with hash 673073701, now seen corresponding path program 1 times [2019-09-09 18:12:08,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:12:08,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:08,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:12:08,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:08,301 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:12:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:12:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:12:08,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:12:08,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 18:12:08,457 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:12:08,457 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 18:12:08,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 18:12:08,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 18:12:08,458 INFO L87 Difference]: Start difference. First operand 1520 states and 2133 transitions. Second operand 5 states. [2019-09-09 18:12:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:12:10,251 INFO L93 Difference]: Finished difference Result 2512 states and 3333 transitions. [2019-09-09 18:12:10,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-09 18:12:10,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-09-09 18:12:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:12:10,265 INFO L225 Difference]: With dead ends: 2512 [2019-09-09 18:12:10,265 INFO L226 Difference]: Without dead ends: 2068 [2019-09-09 18:12:10,266 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:12:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2019-09-09 18:12:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1694. [2019-09-09 18:12:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1694 states. [2019-09-09 18:12:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 1968 transitions. [2019-09-09 18:12:10,343 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 1968 transitions. Word has length 141 [2019-09-09 18:12:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:12:10,344 INFO L475 AbstractCegarLoop]: Abstraction has 1694 states and 1968 transitions. [2019-09-09 18:12:10,344 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 18:12:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 1968 transitions. [2019-09-09 18:12:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-09-09 18:12:10,350 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:12:10,350 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:12:10,350 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:12:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:12:10,351 INFO L82 PathProgramCache]: Analyzing trace with hash 528451226, now seen corresponding path program 1 times [2019-09-09 18:12:10,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:12:10,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:10,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:12:10,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:10,353 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:12:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:12:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:12:10,542 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:12:10,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:12:10,542 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:12:10,543 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:12:10,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:12:10,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:12:10,543 INFO L87 Difference]: Start difference. First operand 1694 states and 1968 transitions. Second operand 4 states. [2019-09-09 18:12:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:12:11,259 INFO L93 Difference]: Finished difference Result 1876 states and 2161 transitions. [2019-09-09 18:12:11,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:12:11,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 240 [2019-09-09 18:12:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:12:11,271 INFO L225 Difference]: With dead ends: 1876 [2019-09-09 18:12:11,271 INFO L226 Difference]: Without dead ends: 1876 [2019-09-09 18:12:11,272 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 18:12:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2019-09-09 18:12:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1876. [2019-09-09 18:12:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2019-09-09 18:12:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2161 transitions. [2019-09-09 18:12:11,320 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2161 transitions. Word has length 240 [2019-09-09 18:12:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:12:11,321 INFO L475 AbstractCegarLoop]: Abstraction has 1876 states and 2161 transitions. [2019-09-09 18:12:11,321 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:12:11,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2161 transitions. [2019-09-09 18:12:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-09-09 18:12:11,327 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:12:11,328 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:12:11,328 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:12:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:12:11,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1924779938, now seen corresponding path program 1 times [2019-09-09 18:12:11,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:12:11,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:11,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:12:11,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:12:11,330 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:12:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:12:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:12:12,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:12:12,149 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:12:12,150 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 282 with the following transitions: [2019-09-09 18:12:12,152 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [622], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:12:12,218 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:12:12,219 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:12:21,230 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:12:21,232 INFO L272 AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Performed 273 root evaluator evaluations with a maximum evaluation depth of 13. Performed 273 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:12:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:12:21,237 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:12:29,831 INFO L227 lantSequenceWeakener]: Weakened 262 states. On average, predicates are now at 78.25% of their original sizes. [2019-09-09 18:12:29,832 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:12:29,935 INFO L420 sIntCurrentIteration]: We unified 280 AI predicates to 280 [2019-09-09 18:12:29,936 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:12:29,936 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:12:29,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2019-09-09 18:12:29,937 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:12:29,938 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:12:29,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:12:29,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:12:29,938 INFO L87 Difference]: Start difference. First operand 1876 states and 2161 transitions. Second operand 11 states. [2019-09-09 18:14:20,266 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:15:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:15:13,419 INFO L93 Difference]: Finished difference Result 2062 states and 2351 transitions. [2019-09-09 18:15:13,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:15:13,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 281 [2019-09-09 18:15:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:15:13,428 INFO L225 Difference]: With dead ends: 2062 [2019-09-09 18:15:13,428 INFO L226 Difference]: Without dead ends: 2062 [2019-09-09 18:15:13,429 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 18:15:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2019-09-09 18:15:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 2058. [2019-09-09 18:15:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2019-09-09 18:15:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 2345 transitions. [2019-09-09 18:15:13,476 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 2345 transitions. Word has length 281 [2019-09-09 18:15:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:15:13,477 INFO L475 AbstractCegarLoop]: Abstraction has 2058 states and 2345 transitions. [2019-09-09 18:15:13,477 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:15:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 2345 transitions. [2019-09-09 18:15:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2019-09-09 18:15:13,485 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:13,485 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:15:13,486 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:13,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1610573163, now seen corresponding path program 1 times [2019-09-09 18:15:13,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:13,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:13,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:13,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:13,488 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 194 proven. 297 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:15:14,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:15:14,595 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:15:14,596 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 392 with the following transitions: [2019-09-09 18:15:14,596 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [622], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:15:14,601 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:15:14,602 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:15:28,141 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:15:28,143 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 565 root evaluator evaluations with a maximum evaluation depth of 13. Performed 565 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:15:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:28,144 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:15:41,020 INFO L227 lantSequenceWeakener]: Weakened 388 states. On average, predicates are now at 77.87% of their original sizes. [2019-09-09 18:15:41,020 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:15:41,108 INFO L420 sIntCurrentIteration]: We unified 390 AI predicates to 390 [2019-09-09 18:15:41,108 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:15:41,109 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:15:41,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2019-09-09 18:15:41,109 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:41,109 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:15:41,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:15:41,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:15:41,110 INFO L87 Difference]: Start difference. First operand 2058 states and 2345 transitions. Second operand 11 states. [2019-09-09 18:16:20,355 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:17:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:17:27,254 INFO L93 Difference]: Finished difference Result 2244 states and 2534 transitions. [2019-09-09 18:17:27,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:17:27,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 391 [2019-09-09 18:17:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:17:27,263 INFO L225 Difference]: With dead ends: 2244 [2019-09-09 18:17:27,263 INFO L226 Difference]: Without dead ends: 2244 [2019-09-09 18:17:27,264 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:17:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2019-09-09 18:17:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2242. [2019-09-09 18:17:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2242 states. [2019-09-09 18:17:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 2532 transitions. [2019-09-09 18:17:27,314 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 2532 transitions. Word has length 391 [2019-09-09 18:17:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:17:27,315 INFO L475 AbstractCegarLoop]: Abstraction has 2242 states and 2532 transitions. [2019-09-09 18:17:27,315 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:17:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 2532 transitions. [2019-09-09 18:17:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2019-09-09 18:17:27,327 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:17:27,327 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:17:27,328 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:17:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:17:27,328 INFO L82 PathProgramCache]: Analyzing trace with hash 740567223, now seen corresponding path program 1 times [2019-09-09 18:17:27,328 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:17:27,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:17:27,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:17:27,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:17:27,330 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:17:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:17:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 551 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-09-09 18:17:28,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:17:28,766 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:17:28,767 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 501 with the following transitions: [2019-09-09 18:17:28,767 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [622], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:17:28,772 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:17:28,772 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:17:41,253 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:18:07,168 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:18:07,169 INFO L272 AbstractInterpreter]: Visited 122 different actions 594 times. Merged at 6 different actions 24 times. Never widened. Performed 1165 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1165 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 5 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:18:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:18:07,169 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:18:17,674 INFO L227 lantSequenceWeakener]: Weakened 497 states. On average, predicates are now at 77.75% of their original sizes. [2019-09-09 18:18:17,674 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:18:17,731 INFO L420 sIntCurrentIteration]: We unified 499 AI predicates to 499 [2019-09-09 18:18:17,731 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:18:17,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:18:17,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2019-09-09 18:18:17,732 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:18:17,732 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:18:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:18:17,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:18:17,733 INFO L87 Difference]: Start difference. First operand 2242 states and 2532 transitions. Second operand 10 states. [2019-09-09 18:20:06,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:20:06,109 INFO L93 Difference]: Finished difference Result 2619 states and 2922 transitions. [2019-09-09 18:20:06,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-09 18:20:06,109 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 500 [2019-09-09 18:20:06,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:20:06,120 INFO L225 Difference]: With dead ends: 2619 [2019-09-09 18:20:06,120 INFO L226 Difference]: Without dead ends: 2619 [2019-09-09 18:20:06,121 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:20:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2019-09-09 18:20:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2614. [2019-09-09 18:20:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2614 states. [2019-09-09 18:20:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 2917 transitions. [2019-09-09 18:20:06,175 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 2917 transitions. Word has length 500 [2019-09-09 18:20:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:20:06,176 INFO L475 AbstractCegarLoop]: Abstraction has 2614 states and 2917 transitions. [2019-09-09 18:20:06,176 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:20:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 2917 transitions. [2019-09-09 18:20:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2019-09-09 18:20:06,195 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:20:06,196 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-09-09 18:20:06,196 INFO L418 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:20:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:20:06,197 INFO L82 PathProgramCache]: Analyzing trace with hash -523694669, now seen corresponding path program 1 times [2019-09-09 18:20:06,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:20:06,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:20:06,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:20:06,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:20:06,198 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:20:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:20:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 541 proven. 211 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-09-09 18:20:06,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:20:06,945 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:20:06,945 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 678 with the following transitions: [2019-09-09 18:20:06,945 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [622], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:20:06,951 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:20:06,952 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:20:30,706 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:21:58,267 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:21:58,267 INFO L272 AbstractInterpreter]: Visited 188 different actions 930 times. Merged at 7 different actions 30 times. Never widened. Performed 1738 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1738 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 8 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:21:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:21:58,268 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:22:35,470 INFO L227 lantSequenceWeakener]: Weakened 674 states. On average, predicates are now at 77.64% of their original sizes. [2019-09-09 18:22:35,471 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:22:35,564 INFO L420 sIntCurrentIteration]: We unified 676 AI predicates to 676 [2019-09-09 18:22:35,564 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:22:35,565 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:22:35,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:22:35,565 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:22:35,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:22:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:22:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:22:35,566 INFO L87 Difference]: Start difference. First operand 2614 states and 2917 transitions. Second operand 10 states. [2019-09-09 18:24:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:24:23,330 INFO L93 Difference]: Finished difference Result 2997 states and 3317 transitions. [2019-09-09 18:24:23,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-09 18:24:23,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 677 [2019-09-09 18:24:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:24:23,341 INFO L225 Difference]: With dead ends: 2997 [2019-09-09 18:24:23,342 INFO L226 Difference]: Without dead ends: 2997 [2019-09-09 18:24:23,342 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:24:23,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2019-09-09 18:24:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 2984. [2019-09-09 18:24:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2984 states. [2019-09-09 18:24:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 3304 transitions. [2019-09-09 18:24:23,400 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 3304 transitions. Word has length 677 [2019-09-09 18:24:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:24:23,401 INFO L475 AbstractCegarLoop]: Abstraction has 2984 states and 3304 transitions. [2019-09-09 18:24:23,401 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:24:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 3304 transitions. [2019-09-09 18:24:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2019-09-09 18:24:23,428 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:24:23,428 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-09-09 18:24:23,429 INFO L418 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:24:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:24:23,429 INFO L82 PathProgramCache]: Analyzing trace with hash -936896420, now seen corresponding path program 1 times [2019-09-09 18:24:23,429 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:24:23,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:24:23,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:24:23,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:24:23,431 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:24:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:24:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 610 proven. 285 refuted. 0 times theorem prover too weak. 914 trivial. 0 not checked. [2019-09-09 18:24:24,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:24:24,319 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:24:24,319 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 754 with the following transitions: [2019-09-09 18:24:24,319 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [622], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:24:24,324 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:24:24,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:24:48,045 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:26:10,572 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:26:10,573 INFO L272 AbstractInterpreter]: Visited 189 different actions 1130 times. Merged at 8 different actions 46 times. Widened at 1 different actions 1 times. Performed 1790 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1790 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 12 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:26:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:26:10,574 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates