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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:41:13,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:41:13,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:41:13,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:41:13,611 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 19:41:13,626 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:41:13,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:41:13,626 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:41:13,626 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:41:13,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:41:13,627 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:41:13,628 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:41:13,628 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:41:13,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:41:13,628 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:41:13,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:41:13,629 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:41:13,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:41:13,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:41:13,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:41:13,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:41:13,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:41:13,630 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:41:13,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:41:13,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:41:13,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:41:13,631 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:41:13,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:41:13,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:41:13,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:41:13,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:41:13,632 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:41:13,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:41:13,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:41:13,632 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:41:13,661 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:41:13,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:41:13,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:41:13,679 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:41:13,679 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:41:13,680 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-09-09 19:41:13,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/155b2d029/b299060604c74db4bb69a32ff15f4220/FLAGe9afd700a [2019-09-09 19:41:14,384 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:41:14,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-09-09 19:41:14,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/155b2d029/b299060604c74db4bb69a32ff15f4220/FLAGe9afd700a [2019-09-09 19:41:14,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/155b2d029/b299060604c74db4bb69a32ff15f4220 [2019-09-09 19:41:14,600 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:41:14,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:41:14,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:41:14,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:41:14,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:41:14,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:41:14" (1/1) ... [2019-09-09 19:41:14,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf01bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:14, skipping insertion in model container [2019-09-09 19:41:14,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:41:14" (1/1) ... [2019-09-09 19:41:14,618 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:41:14,709 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:41:15,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:41:15,748 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:41:16,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:41:16,111 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:41:16,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16 WrapperNode [2019-09-09 19:41:16,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:41:16,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:41:16,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:41:16,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:41:16,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16" (1/1) ... [2019-09-09 19:41:16,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16" (1/1) ... [2019-09-09 19:41:16,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16" (1/1) ... [2019-09-09 19:41:16,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16" (1/1) ... [2019-09-09 19:41:16,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16" (1/1) ... [2019-09-09 19:41:16,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16" (1/1) ... [2019-09-09 19:41:16,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16" (1/1) ... [2019-09-09 19:41:16,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:41:16,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:41:16,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:41:16,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:41:16,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16" (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 19:41:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:41:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:41:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:41:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:41:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:41:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:41:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:41:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:41:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:41:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:41:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:41:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:41:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:41:19,692 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:41:19,693 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:41:19,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:41:19 BoogieIcfgContainer [2019-09-09 19:41:19,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:41:19,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:41:19,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:41:19,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:41:19,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:41:14" (1/3) ... [2019-09-09 19:41:19,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40675d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:41:19, skipping insertion in model container [2019-09-09 19:41:19,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:16" (2/3) ... [2019-09-09 19:41:19,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40675d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:41:19, skipping insertion in model container [2019-09-09 19:41:19,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:41:19" (3/3) ... [2019-09-09 19:41:19,719 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label54.c [2019-09-09 19:41:19,746 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:41:19,761 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:41:19,785 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:41:19,820 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:41:19,820 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:41:19,820 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:41:19,821 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:41:19,821 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:41:19,821 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:41:19,821 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:41:19,822 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:41:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:41:19,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-09 19:41:19,927 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:41:19,928 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] [2019-09-09 19:41:19,930 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:41:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:41:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash 54256576, now seen corresponding path program 1 times [2019-09-09 19:41:19,940 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:41:19,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:19,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:41:19,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:19,996 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:41:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:41:20,316 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 19:41:20,319 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:41:20,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 19:41:20,320 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:41:20,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 19:41:20,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 19:41:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 19:41:20,350 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 3 states. [2019-09-09 19:41:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:41:23,193 INFO L93 Difference]: Finished difference Result 758 states and 1268 transitions. [2019-09-09 19:41:23,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 19:41:23,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-09-09 19:41:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:41:23,223 INFO L225 Difference]: With dead ends: 758 [2019-09-09 19:41:23,223 INFO L226 Difference]: Without dead ends: 690 [2019-09-09 19:41:23,225 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 19:41:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-09-09 19:41:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-09-09 19:41:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-09-09 19:41:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1151 transitions. [2019-09-09 19:41:23,332 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1151 transitions. Word has length 46 [2019-09-09 19:41:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:41:23,333 INFO L475 AbstractCegarLoop]: Abstraction has 690 states and 1151 transitions. [2019-09-09 19:41:23,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 19:41:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1151 transitions. [2019-09-09 19:41:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-09 19:41:23,340 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:41:23,340 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:41:23,340 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:41:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:41:23,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1294252235, now seen corresponding path program 1 times [2019-09-09 19:41:23,341 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:41:23,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:23,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:41:23,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:23,343 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:41:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:41:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:41:23,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:41:23,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:41:23,662 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:41:23,664 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:41:23,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:41:23,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:41:23,666 INFO L87 Difference]: Start difference. First operand 690 states and 1151 transitions. Second operand 4 states. [2019-09-09 19:41:27,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:41:27,506 INFO L93 Difference]: Finished difference Result 1923 states and 2734 transitions. [2019-09-09 19:41:27,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:41:27,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-09-09 19:41:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:41:27,522 INFO L225 Difference]: With dead ends: 1923 [2019-09-09 19:41:27,523 INFO L226 Difference]: Without dead ends: 1923 [2019-09-09 19:41:27,524 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 19:41:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2019-09-09 19:41:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1923. [2019-09-09 19:41:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1923 states. [2019-09-09 19:41:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2734 transitions. [2019-09-09 19:41:27,596 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2734 transitions. Word has length 126 [2019-09-09 19:41:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:41:27,597 INFO L475 AbstractCegarLoop]: Abstraction has 1923 states and 2734 transitions. [2019-09-09 19:41:27,597 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:41:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2734 transitions. [2019-09-09 19:41:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-09 19:41:27,608 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:41:27,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:41:27,609 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:41:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:41:27,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1175711612, now seen corresponding path program 1 times [2019-09-09 19:41:27,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:41:27,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:27,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:41:27,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:27,612 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:41:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:41:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:41:27,927 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:41:27,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:41:27,928 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:41:27,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:41:27,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:41:27,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:41:27,929 INFO L87 Difference]: Start difference. First operand 1923 states and 2734 transitions. Second operand 6 states. [2019-09-09 19:41:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:41:31,617 INFO L93 Difference]: Finished difference Result 2597 states and 3568 transitions. [2019-09-09 19:41:31,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 19:41:31,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-09-09 19:41:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:41:31,633 INFO L225 Difference]: With dead ends: 2597 [2019-09-09 19:41:31,633 INFO L226 Difference]: Without dead ends: 2597 [2019-09-09 19:41:31,634 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 19:41:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2019-09-09 19:41:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2582. [2019-09-09 19:41:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2582 states. [2019-09-09 19:41:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 3535 transitions. [2019-09-09 19:41:31,705 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 3535 transitions. Word has length 145 [2019-09-09 19:41:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:41:31,706 INFO L475 AbstractCegarLoop]: Abstraction has 2582 states and 3535 transitions. [2019-09-09 19:41:31,706 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:41:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 3535 transitions. [2019-09-09 19:41:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-09-09 19:41:31,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:41:31,712 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:41:31,713 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:41:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:41:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash 211824498, now seen corresponding path program 1 times [2019-09-09 19:41:31,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:41:31,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:31,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:41:31,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:31,715 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:41:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:41:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 19:41:31,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:41:31,892 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:41:31,893 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 237 with the following transitions: [2019-09-09 19:41:31,895 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], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [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], [675], [676], [680], [684], [688], [692], [696], [699], [704], [706], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:41:31,965 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:41:31,965 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:41:34,278 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:41:34,280 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 19:41:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:41:34,284 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:41:36,602 INFO L227 lantSequenceWeakener]: Weakened 215 states. On average, predicates are now at 78% of their original sizes. [2019-09-09 19:41:36,602 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:41:36,677 INFO L420 sIntCurrentIteration]: We unified 235 AI predicates to 235 [2019-09-09 19:41:36,677 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:41:36,678 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:41:36,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 19:41:36,679 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:41:36,679 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:41:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:41:36,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:41:36,680 INFO L87 Difference]: Start difference. First operand 2582 states and 3535 transitions. Second operand 11 states. [2019-09-09 19:41:45,738 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:55:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:55:19,165 INFO L93 Difference]: Finished difference Result 2893 states and 3859 transitions. [2019-09-09 19:55:19,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 19:55:19,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 236 [2019-09-09 19:55:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:55:19,180 INFO L225 Difference]: With dead ends: 2893 [2019-09-09 19:55:19,181 INFO L226 Difference]: Without dead ends: 2893 [2019-09-09 19:55:19,182 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 226 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 19:55:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2019-09-09 19:55:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2889. [2019-09-09 19:55:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2889 states. [2019-09-09 19:55:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 3851 transitions. [2019-09-09 19:55:19,261 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 3851 transitions. Word has length 236 [2019-09-09 19:55:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:55:19,262 INFO L475 AbstractCegarLoop]: Abstraction has 2889 states and 3851 transitions. [2019-09-09 19:55:19,262 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 19:55:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 3851 transitions. [2019-09-09 19:55:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-09-09 19:55:19,267 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:55:19,267 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 19:55:19,268 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:55:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:55:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1928205526, now seen corresponding path program 1 times [2019-09-09 19:55:19,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:55:19,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:55:19,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:55:19,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:55:19,274 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:55:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:55:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 79 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:55:19,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:55:19,576 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:55:19,576 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 270 with the following transitions: [2019-09-09 19:55:19,577 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], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [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], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [872], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:55:19,585 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:55:19,585 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:55:20,974 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:55:26,001 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:55:26,002 INFO L272 AbstractInterpreter]: Visited 136 different actions 267 times. Merged at 4 different actions 5 times. Never widened. Performed 551 root evaluator evaluations with a maximum evaluation depth of 14. Performed 551 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:55:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:55:26,003 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:55:28,362 INFO L227 lantSequenceWeakener]: Weakened 266 states. On average, predicates are now at 77.75% of their original sizes. [2019-09-09 19:55:28,363 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:55:28,466 INFO L420 sIntCurrentIteration]: We unified 268 AI predicates to 268 [2019-09-09 19:55:28,466 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:55:28,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:55:28,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 19:55:28,467 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:55:28,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:55:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:55:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:55:28,468 INFO L87 Difference]: Start difference. First operand 2889 states and 3851 transitions. Second operand 12 states.