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/Problem02_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:40:18,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:40:18,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:40:18,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:40:18,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 17:40:18,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 17:40:18,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 17:40:18,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 17:40:18,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 17:40:18,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 17:40:18,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 17:40:18,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 17:40:18,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 17:40:18,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 17:40:18,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 17:40:18,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 17:40:18,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 17:40:18,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 17:40:18,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 17:40:18,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 17:40:18,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 17:40:18,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 17:40:18,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 17:40:18,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 17:40:18,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 17:40:18,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 17:40:18,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 17:40:18,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 17:40:18,834 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 [2019-10-02 17:40:18,860 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:40:18,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:40:18,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:40:18,861 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:40:18,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:40:18,862 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:40:18,863 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:40:18,863 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:40:18,863 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:40:18,863 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:40:18,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:40:18,865 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:40:18,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:40:18,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:40:18,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:40:18,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:40:18,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:40:18,867 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:40:18,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:40:18,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:40:18,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:40:18,868 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:40:18,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:40:18,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:40:18,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:40:18,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:40:18,869 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:40:18,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:40:18,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:40:18,869 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:40:18,926 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:40:18,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:40:18,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:40:18,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:40:18,949 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:40:18,950 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-10-02 17:40:19,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d6eaf50d/6e5f0d13ab52405da3bd764a445b8d68/FLAGfe9e43c4e [2019-10-02 17:40:19,588 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:40:19,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-10-02 17:40:19,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d6eaf50d/6e5f0d13ab52405da3bd764a445b8d68/FLAGfe9e43c4e [2019-10-02 17:40:19,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d6eaf50d/6e5f0d13ab52405da3bd764a445b8d68 [2019-10-02 17:40:19,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:40:19,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:40:19,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:40:19,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:40:19,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:40:19,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:40:19" (1/1) ... [2019-10-02 17:40:19,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fba2a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:19, skipping insertion in model container [2019-10-02 17:40:19,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:40:19" (1/1) ... [2019-10-02 17:40:19,871 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:40:19,916 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:40:20,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:40:20,469 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:40:20,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:40:20,570 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:40:20,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20 WrapperNode [2019-10-02 17:40:20,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:40:20,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:40:20,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:40:20,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:40:20,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20" (1/1) ... [2019-10-02 17:40:20,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20" (1/1) ... [2019-10-02 17:40:20,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20" (1/1) ... [2019-10-02 17:40:20,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20" (1/1) ... [2019-10-02 17:40:20,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20" (1/1) ... [2019-10-02 17:40:20,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20" (1/1) ... [2019-10-02 17:40:20,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20" (1/1) ... [2019-10-02 17:40:20,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:40:20,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:40:20,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:40:20,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:40:20,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20" (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 [2019-10-02 17:40:20,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:40:20,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:40:20,741 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:40:20,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:40:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:40:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:40:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:40:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:40:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:40:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:40:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:40:21,928 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:40:21,928 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:40:21,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:40:21 BoogieIcfgContainer [2019-10-02 17:40:21,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:40:21,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:40:21,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:40:21,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:40:21,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:40:19" (1/3) ... [2019-10-02 17:40:21,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a974a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:40:21, skipping insertion in model container [2019-10-02 17:40:21,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:40:20" (2/3) ... [2019-10-02 17:40:21,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a974a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:40:21, skipping insertion in model container [2019-10-02 17:40:21,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:40:21" (3/3) ... [2019-10-02 17:40:21,939 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label54.c [2019-10-02 17:40:21,949 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:40:21,958 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:40:21,976 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:40:22,003 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:40:22,004 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:40:22,004 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:40:22,004 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:40:22,004 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:40:22,005 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:40:22,005 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:40:22,005 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:40:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-02 17:40:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-02 17:40:22,043 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:40:22,044 INFO L411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:40:22,046 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:40:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:40:22,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1789175463, now seen corresponding path program 1 times [2019-10-02 17:40:22,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:40:22,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:22,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:40:22,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:22,099 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:40:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:40:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:40:22,481 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:40:22,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:40:22,482 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:40:22,490 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:40:22,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:40:22,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:40:22,508 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-02 17:40:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:40:23,476 INFO L93 Difference]: Finished difference Result 388 states and 554 transitions. [2019-10-02 17:40:23,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:40:23,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-10-02 17:40:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:40:23,507 INFO L225 Difference]: With dead ends: 388 [2019-10-02 17:40:23,507 INFO L226 Difference]: Without dead ends: 320 [2019-10-02 17:40:23,510 INFO L640 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 [2019-10-02 17:40:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-02 17:40:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-02 17:40:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-02 17:40:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-10-02 17:40:23,611 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 107 [2019-10-02 17:40:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:40:23,612 INFO L475 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-10-02 17:40:23,612 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:40:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-10-02 17:40:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-02 17:40:23,619 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:40:23,620 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 17:40:23,620 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:40:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:40:23,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1651920546, now seen corresponding path program 1 times [2019-10-02 17:40:23,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:40:23,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:23,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:40:23,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:23,623 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:40:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:40:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:40:23,760 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:40:23,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:40:23,760 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:40:23,762 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:40:23,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:40:23,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:40:23,763 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 3 states. [2019-10-02 17:40:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:40:24,362 INFO L93 Difference]: Finished difference Result 609 states and 848 transitions. [2019-10-02 17:40:24,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:40:24,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-10-02 17:40:24,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:40:24,367 INFO L225 Difference]: With dead ends: 609 [2019-10-02 17:40:24,367 INFO L226 Difference]: Without dead ends: 609 [2019-10-02 17:40:24,368 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:40:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-10-02 17:40:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2019-10-02 17:40:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-10-02 17:40:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 848 transitions. [2019-10-02 17:40:24,404 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 848 transitions. Word has length 115 [2019-10-02 17:40:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:40:24,405 INFO L475 AbstractCegarLoop]: Abstraction has 609 states and 848 transitions. [2019-10-02 17:40:24,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:40:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 848 transitions. [2019-10-02 17:40:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-02 17:40:24,410 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:40:24,410 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 17:40:24,411 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:40:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:40:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1194422463, now seen corresponding path program 1 times [2019-10-02 17:40:24,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:40:24,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:24,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:40:24,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:24,414 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:40:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:40:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:40:24,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:40:24,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:40:24,553 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:40:24,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:40:24,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:40:24,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:40:24,556 INFO L87 Difference]: Start difference. First operand 609 states and 848 transitions. Second operand 6 states. [2019-10-02 17:40:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:40:25,464 INFO L93 Difference]: Finished difference Result 1236 states and 1763 transitions. [2019-10-02 17:40:25,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:40:25,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-10-02 17:40:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:40:25,475 INFO L225 Difference]: With dead ends: 1236 [2019-10-02 17:40:25,475 INFO L226 Difference]: Without dead ends: 1236 [2019-10-02 17:40:25,476 INFO L640 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 [2019-10-02 17:40:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2019-10-02 17:40:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1213. [2019-10-02 17:40:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2019-10-02 17:40:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1689 transitions. [2019-10-02 17:40:25,533 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1689 transitions. Word has length 129 [2019-10-02 17:40:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:40:25,533 INFO L475 AbstractCegarLoop]: Abstraction has 1213 states and 1689 transitions. [2019-10-02 17:40:25,533 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:40:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1689 transitions. [2019-10-02 17:40:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-02 17:40:25,541 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:40:25,542 INFO L411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:40:25,542 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:40:25,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:40:25,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1695944947, now seen corresponding path program 1 times [2019-10-02 17:40:25,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:40:25,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:25,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:40:25,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:25,545 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:40:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:40:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:40:25,692 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:40:25,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:40:25,692 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:40:25,693 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:40:25,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:40:25,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:40:25,694 INFO L87 Difference]: Start difference. First operand 1213 states and 1689 transitions. Second operand 6 states. [2019-10-02 17:40:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:40:26,632 INFO L93 Difference]: Finished difference Result 1838 states and 2511 transitions. [2019-10-02 17:40:26,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:40:26,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-10-02 17:40:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:40:26,649 INFO L225 Difference]: With dead ends: 1838 [2019-10-02 17:40:26,649 INFO L226 Difference]: Without dead ends: 1838 [2019-10-02 17:40:26,650 INFO L640 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 [2019-10-02 17:40:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2019-10-02 17:40:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1817. [2019-10-02 17:40:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2019-10-02 17:40:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2438 transitions. [2019-10-02 17:40:26,721 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2438 transitions. Word has length 135 [2019-10-02 17:40:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:40:26,722 INFO L475 AbstractCegarLoop]: Abstraction has 1817 states and 2438 transitions. [2019-10-02 17:40:26,723 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:40:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2438 transitions. [2019-10-02 17:40:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-02 17:40:26,733 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:40:26,734 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 17:40:26,734 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:40:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:40:26,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1552967928, now seen corresponding path program 1 times [2019-10-02 17:40:26,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:40:26,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:26,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:40:26,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:40:26,742 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:40:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:40:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:40:27,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:40:27,025 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:40:27,026 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 143 with the following transitions: [2019-10-02 17:40:27,028 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [25], [26], [30], [34], [38], [42], [53], [64], [68], [72], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [152], [156], [160], [171], [175], [179], [183], [187], [191], [195], [199], [210], [214], [218], [222], [233], [237], [241], [245], [249], [253], [257], [268], [272], [283], [287], [298], [309], [313], [317], [321], [325], [329], [333], [344], [348], [352], [356], [360], [364], [368], [372], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [535], [537], [863], [867], [876], [880], [882], [887], [888], [889], [891], [892] [2019-10-02 17:40:27,084 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:40:27,085 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 17:52:22,924 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 17:52:22,927 INFO L272 AbstractInterpreter]: Visited 111 different actions 325 times. Merged at 6 different actions 12 times. Never widened. Performed 794 root evaluator evaluations with a maximum evaluation depth of 18. Performed 794 inverse root evaluator evaluations with a maximum inverse evaluation depth of 18. Found 3 fixpoints after 2 different actions. Largest state had 38 variables. [2019-10-02 17:52:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:52:22,932 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates