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/Problem15_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:58:13,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:58:13,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:58:13,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:58:13,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:58:13,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:58:13,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:58:13,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:58:13,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:58:13,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:58:13,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:58:13,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:58:13,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:58:13,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:58:13,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:58:13,651 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 18:58:13,680 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:58:13,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:58:13,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:58:13,682 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:58:13,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:58:13,682 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:58:13,683 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:58:13,683 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:58:13,685 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:58:13,685 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:58:13,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:58:13,687 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:58:13,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:58:13,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:58:13,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:58:13,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:58:13,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:58:13,688 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:58:13,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:58:13,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:58:13,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:58:13,690 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:58:13,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:58:13,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:58:13,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:58:13,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:58:13,691 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:58:13,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:58:13,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:58:13,691 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:58:13,746 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:58:13,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:58:13,765 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:58:13,766 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:58:13,766 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:58:13,767 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label12.c [2019-09-09 18:58:13,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a97d3f601/47ff1d1edea94da4a1655b829c78997f/FLAGdf6251563 [2019-09-09 18:58:14,439 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:58:14,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label12.c [2019-09-09 18:58:14,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a97d3f601/47ff1d1edea94da4a1655b829c78997f/FLAGdf6251563 [2019-09-09 18:58:14,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a97d3f601/47ff1d1edea94da4a1655b829c78997f [2019-09-09 18:58:14,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:58:14,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:58:14,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:58:14,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:58:14,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:58:14,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:58:14" (1/1) ... [2019-09-09 18:58:14,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5748c03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:14, skipping insertion in model container [2019-09-09 18:58:14,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:58:14" (1/1) ... [2019-09-09 18:58:14,677 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:58:14,757 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:58:15,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:58:15,692 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:58:16,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:58:16,069 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:58:16,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16 WrapperNode [2019-09-09 18:58:16,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:58:16,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:58:16,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:58:16,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:58:16,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16" (1/1) ... [2019-09-09 18:58:16,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16" (1/1) ... [2019-09-09 18:58:16,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16" (1/1) ... [2019-09-09 18:58:16,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16" (1/1) ... [2019-09-09 18:58:16,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16" (1/1) ... [2019-09-09 18:58:16,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16" (1/1) ... [2019-09-09 18:58:16,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16" (1/1) ... [2019-09-09 18:58:16,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:58:16,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:58:16,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:58:16,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:58:16,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16" (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 18:58:16,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:58:16,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:58:16,387 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:58:16,387 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 18:58:16,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:58:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:58:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 18:58:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:58:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:58:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:58:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:58:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:58:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:58:19,582 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:58:19,583 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:58:19,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:58:19 BoogieIcfgContainer [2019-09-09 18:58:19,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:58:19,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:58:19,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:58:19,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:58:19,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:58:14" (1/3) ... [2019-09-09 18:58:19,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a00698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:58:19, skipping insertion in model container [2019-09-09 18:58:19,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:58:16" (2/3) ... [2019-09-09 18:58:19,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a00698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:58:19, skipping insertion in model container [2019-09-09 18:58:19,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:58:19" (3/3) ... [2019-09-09 18:58:19,594 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label12.c [2019-09-09 18:58:19,604 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:58:19,616 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:58:19,669 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:58:19,704 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:58:19,704 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:58:19,704 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:58:19,704 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:58:19,704 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:58:19,704 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:58:19,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:58:19,705 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:58:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 18:58:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-09 18:58:19,747 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:58:19,748 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] [2019-09-09 18:58:19,750 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:58:19,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:58:19,755 INFO L82 PathProgramCache]: Analyzing trace with hash -397334259, now seen corresponding path program 1 times [2019-09-09 18:58:19,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:58:19,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:58:19,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:58:19,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:58:19,799 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:58:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:58:20,103 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 18:58:20,106 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:58:20,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:58:20,107 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:58:20,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:58:20,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:58:20,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:58:20,130 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 3 states. [2019-09-09 18:58:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:58:23,019 INFO L93 Difference]: Finished difference Result 758 states and 1268 transitions. [2019-09-09 18:58:23,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:58:23,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2019-09-09 18:58:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:58:23,050 INFO L225 Difference]: With dead ends: 758 [2019-09-09 18:58:23,051 INFO L226 Difference]: Without dead ends: 690 [2019-09-09 18:58:23,053 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:58:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-09-09 18:58:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-09-09 18:58:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-09-09 18:58:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1151 transitions. [2019-09-09 18:58:23,155 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1151 transitions. Word has length 65 [2019-09-09 18:58:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:58:23,156 INFO L475 AbstractCegarLoop]: Abstraction has 690 states and 1151 transitions. [2019-09-09 18:58:23,156 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:58:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1151 transitions. [2019-09-09 18:58:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-09 18:58:23,163 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:58:23,164 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, 1, 1, 1, 1, 1, 1, 1, 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 18:58:23,164 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:58:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:58:23,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1461273985, now seen corresponding path program 1 times [2019-09-09 18:58:23,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:58:23,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:58:23,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:58:23,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:58:23,167 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:58:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:58:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:58:23,474 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:58:23,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:58:23,474 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:58:23,476 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:58:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:58:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:58:23,477 INFO L87 Difference]: Start difference. First operand 690 states and 1151 transitions. Second operand 4 states. [2019-09-09 18:58:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:58:29,894 INFO L93 Difference]: Finished difference Result 1973 states and 3147 transitions. [2019-09-09 18:58:29,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:58:29,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-09-09 18:58:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:58:29,909 INFO L225 Difference]: With dead ends: 1973 [2019-09-09 18:58:29,910 INFO L226 Difference]: Without dead ends: 1973 [2019-09-09 18:58:29,911 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 18:58:29,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2019-09-09 18:58:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1968. [2019-09-09 18:58:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1968 states. [2019-09-09 18:58:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 3141 transitions. [2019-09-09 18:58:30,034 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 3141 transitions. Word has length 145 [2019-09-09 18:58:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:58:30,037 INFO L475 AbstractCegarLoop]: Abstraction has 1968 states and 3141 transitions. [2019-09-09 18:58:30,037 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:58:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 3141 transitions. [2019-09-09 18:58:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-09-09 18:58:30,050 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:58:30,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:30,051 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:58:30,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:58:30,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1037860370, now seen corresponding path program 1 times [2019-09-09 18:58:30,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:58:30,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:58:30,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:58:30,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:58:30,055 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:58:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:58:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:58:30,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:58:30,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:58:30,329 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:58:30,332 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:58:30,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:58:30,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:58:30,333 INFO L87 Difference]: Start difference. First operand 1968 states and 3141 transitions. Second operand 6 states. [2019-09-09 18:58:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:58:33,655 INFO L93 Difference]: Finished difference Result 2652 states and 3989 transitions. [2019-09-09 18:58:33,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 18:58:33,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2019-09-09 18:58:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:58:33,672 INFO L225 Difference]: With dead ends: 2652 [2019-09-09 18:58:33,673 INFO L226 Difference]: Without dead ends: 2652 [2019-09-09 18:58:33,673 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 18:58:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2019-09-09 18:58:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2637. [2019-09-09 18:58:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2637 states. [2019-09-09 18:58:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3953 transitions. [2019-09-09 18:58:33,753 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3953 transitions. Word has length 164 [2019-09-09 18:58:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:58:33,754 INFO L475 AbstractCegarLoop]: Abstraction has 2637 states and 3953 transitions. [2019-09-09 18:58:33,754 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:58:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3953 transitions. [2019-09-09 18:58:33,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-09 18:58:33,759 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:58:33,760 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, 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] [2019-09-09 18:58:33,760 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:58:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:58:33,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1986219403, now seen corresponding path program 1 times [2019-09-09 18:58:33,761 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:58:33,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:58:33,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:58:33,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:58:33,762 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:58:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:58:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 117 proven. 63 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 18:58:34,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:58:34,038 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:58:34,039 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2019-09-09 18:58:34,042 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [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], [457], [465], [473], [481], [489], [497], [501], [503], [506], [514], [522], [530], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [699], [704], [706], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 18:58:34,157 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:58:34,157 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:58:37,538 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:58:37,540 INFO L272 AbstractInterpreter]: Visited 102 different actions 102 times. Never merged. Never widened. Performed 243 root evaluator evaluations with a maximum evaluation depth of 13. Performed 243 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:58:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:58:37,545 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:58:39,482 INFO L227 lantSequenceWeakener]: Weakened 212 states. On average, predicates are now at 78.42% of their original sizes. [2019-09-09 18:58:39,482 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:58:39,630 INFO L420 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2019-09-09 18:58:39,630 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:58:39,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:58:39,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 18:58:39,636 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:58:39,637 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:58:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:58:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:58:39,639 INFO L87 Difference]: Start difference. First operand 2637 states and 3953 transitions. Second operand 11 states. [2019-09-09 18:58:49,414 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:08:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:08:47,866 INFO L93 Difference]: Finished difference Result 2948 states and 4275 transitions. [2019-09-09 19:08:47,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 19:08:47,866 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 233 [2019-09-09 19:08:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:08:47,880 INFO L225 Difference]: With dead ends: 2948 [2019-09-09 19:08:47,880 INFO L226 Difference]: Without dead ends: 2948 [2019-09-09 19:08:47,881 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 223 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 19:08:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2019-09-09 19:08:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2944. [2019-09-09 19:08:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2944 states. [2019-09-09 19:08:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 4268 transitions. [2019-09-09 19:08:47,952 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 4268 transitions. Word has length 233 [2019-09-09 19:08:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:08:47,952 INFO L475 AbstractCegarLoop]: Abstraction has 2944 states and 4268 transitions. [2019-09-09 19:08:47,953 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 19:08:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 4268 transitions. [2019-09-09 19:08:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-09-09 19:08:47,958 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:08:47,958 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 19:08:47,958 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:08:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:08:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2029261453, now seen corresponding path program 1 times [2019-09-09 19:08:47,959 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:08:47,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:47,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:08:47,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:47,961 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:08:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:08:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 117 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:08:48,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:08:48,184 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:08:48,184 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2019-09-09 19:08:48,185 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [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], [457], [465], [473], [481], [489], [497], [501], [503], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [699], [704], [706], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:08:48,190 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:08:48,190 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:08:49,376 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:08:50,180 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:08:50,181 INFO L272 AbstractInterpreter]: Visited 105 different actions 205 times. Merged at 4 different actions 5 times. Never widened. Performed 458 root evaluator evaluations with a maximum evaluation depth of 13. Performed 458 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 19:08:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:08:50,182 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:08:51,307 INFO L227 lantSequenceWeakener]: Weakened 254 states. On average, predicates are now at 78.11% of their original sizes. [2019-09-09 19:08:51,307 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:08:51,404 INFO L420 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2019-09-09 19:08:51,405 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:08:51,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:08:51,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2019-09-09 19:08:51,405 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:08:51,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:08:51,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:08:51,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:08:51,406 INFO L87 Difference]: Start difference. First operand 2944 states and 4268 transitions. Second operand 12 states.