java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label22_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:06:04,794 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:06:04,796 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:06:04,813 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:06:04,815 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:06:04,816 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:06:04,817 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:06:04,821 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:06:04,824 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:06:04,827 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:06:04,828 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:06:04,828 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:06:04,829 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:06:04,834 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:06:04,841 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:06:04,845 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:06:04,846 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:06:04,848 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:06:04,849 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:06:04,851 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:06:04,852 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:06:04,853 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:06:04,856 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:06:04,856 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:06:04,856 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:06:04,857 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:06:04,858 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:06:04,859 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:06:04,860 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:06:04,861 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:06:04,861 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:06:04,862 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:06:04,862 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:06:04,862 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:06:04,863 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:06:04,864 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:06:04,864 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:06:04,880 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:06:04,881 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:06:04,881 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:06:04,882 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:06:04,882 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:06:04,882 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:06:04,882 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:06:04,882 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:06:04,883 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:06:04,883 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:06:04,883 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:06:04,883 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:06:04,884 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:06:04,884 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:06:04,885 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:06:04,885 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:06:04,885 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:06:04,885 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:06:04,885 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:06:04,886 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:06:04,886 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:06:04,886 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:06:04,886 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:06:04,887 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:06:04,887 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:06:04,887 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:06:04,887 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:06:04,887 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:06:04,888 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:06:04,888 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:06:04,888 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:06:04,888 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:06:04,888 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:06:04,889 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:06:04,889 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:06:04,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:06:04,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:06:04,959 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:06:04,961 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:06:04,961 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:06:04,962 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label22_false-unreach-call.c [2018-11-07 18:06:05,030 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb0b99f6/225f90092c274c89969c76d3e9b7c92c/FLAG7fd2a311b [2018-11-07 18:06:05,735 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:06:05,736 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label22_false-unreach-call.c [2018-11-07 18:06:05,761 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb0b99f6/225f90092c274c89969c76d3e9b7c92c/FLAG7fd2a311b [2018-11-07 18:06:05,781 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb0b99f6/225f90092c274c89969c76d3e9b7c92c [2018-11-07 18:06:05,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:06:05,797 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:06:05,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:06:05,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:06:05,804 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:06:05,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:06:05" (1/1) ... [2018-11-07 18:06:05,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd4ad97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:05, skipping insertion in model container [2018-11-07 18:06:05,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:06:05" (1/1) ... [2018-11-07 18:06:05,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:06:05,936 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:06:06,738 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:06:06,743 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:06:07,050 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:06:07,074 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:06:07,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07 WrapperNode [2018-11-07 18:06:07,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:06:07,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:06:07,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:06:07,076 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:06:07,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (1/1) ... [2018-11-07 18:06:07,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (1/1) ... [2018-11-07 18:06:07,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:06:07,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:06:07,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:06:07,342 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:06:07,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (1/1) ... [2018-11-07 18:06:07,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (1/1) ... [2018-11-07 18:06:07,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (1/1) ... [2018-11-07 18:06:07,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (1/1) ... [2018-11-07 18:06:07,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (1/1) ... [2018-11-07 18:06:07,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (1/1) ... [2018-11-07 18:06:07,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (1/1) ... [2018-11-07 18:06:07,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:06:07,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:06:07,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:06:07,517 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:06:07,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (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 [2018-11-07 18:06:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:06:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:06:07,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:06:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:06:07,594 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:06:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:06:07,595 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:06:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:06:07,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:06:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:06:07,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:06:13,139 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:06:13,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:06:13 BoogieIcfgContainer [2018-11-07 18:06:13,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:06:13,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:06:13,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:06:13,147 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:06:13,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:06:05" (1/3) ... [2018-11-07 18:06:13,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785cc86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:06:13, skipping insertion in model container [2018-11-07 18:06:13,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:06:07" (2/3) ... [2018-11-07 18:06:13,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785cc86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:06:13, skipping insertion in model container [2018-11-07 18:06:13,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:06:13" (3/3) ... [2018-11-07 18:06:13,151 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label22_false-unreach-call.c [2018-11-07 18:06:13,162 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:06:13,172 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:06:13,190 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:06:13,233 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:06:13,233 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:06:13,233 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:06:13,233 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:06:13,234 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:06:13,234 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:06:13,234 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:06:13,234 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:06:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-11-07 18:06:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-07 18:06:13,277 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:13,278 INFO L375 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] [2018-11-07 18:06:13,281 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:13,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:13,286 INFO L82 PathProgramCache]: Analyzing trace with hash 417311457, now seen corresponding path program 1 times [2018-11-07 18:06:13,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:13,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:13,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:13,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:13,339 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:06:13,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:06:13,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:06:13,764 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:13,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:06:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:06:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:06:13,791 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-11-07 18:06:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:21,150 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-11-07 18:06:21,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:06:21,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-11-07 18:06:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:21,178 INFO L225 Difference]: With dead ends: 1558 [2018-11-07 18:06:21,178 INFO L226 Difference]: Without dead ends: 1114 [2018-11-07 18:06:21,189 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:06:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-11-07 18:06:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1091. [2018-11-07 18:06:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2018-11-07 18:06:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1853 transitions. [2018-11-07 18:06:21,322 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1853 transitions. Word has length 25 [2018-11-07 18:06:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:21,323 INFO L480 AbstractCegarLoop]: Abstraction has 1091 states and 1853 transitions. [2018-11-07 18:06:21,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:06:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1853 transitions. [2018-11-07 18:06:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-07 18:06:21,329 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:21,329 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:06:21,330 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:21,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:21,330 INFO L82 PathProgramCache]: Analyzing trace with hash -764927732, now seen corresponding path program 1 times [2018-11-07 18:06:21,330 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:21,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:21,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:21,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:21,332 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:06:21,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:06:21,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 18:06:21,630 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:21,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 18:06:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 18:06:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 18:06:21,633 INFO L87 Difference]: Start difference. First operand 1091 states and 1853 transitions. Second operand 5 states. [2018-11-07 18:06:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:27,528 INFO L93 Difference]: Finished difference Result 3246 states and 5588 transitions. [2018-11-07 18:06:27,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 18:06:27,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2018-11-07 18:06:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:27,555 INFO L225 Difference]: With dead ends: 3246 [2018-11-07 18:06:27,555 INFO L226 Difference]: Without dead ends: 2161 [2018-11-07 18:06:27,562 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:06:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2018-11-07 18:06:27,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2114. [2018-11-07 18:06:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2018-11-07 18:06:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3176 transitions. [2018-11-07 18:06:27,674 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3176 transitions. Word has length 98 [2018-11-07 18:06:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:27,676 INFO L480 AbstractCegarLoop]: Abstraction has 2114 states and 3176 transitions. [2018-11-07 18:06:27,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 18:06:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3176 transitions. [2018-11-07 18:06:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-11-07 18:06:27,685 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:27,686 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:06:27,686 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:27,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash -349048548, now seen corresponding path program 1 times [2018-11-07 18:06:27,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:27,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:27,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:27,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:27,689 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:06:27,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:06:27,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:06:27,948 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:27,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:06:27,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:06:27,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:06:27,950 INFO L87 Difference]: Start difference. First operand 2114 states and 3176 transitions. Second operand 4 states. [2018-11-07 18:06:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:33,043 INFO L93 Difference]: Finished difference Result 7944 states and 12441 transitions. [2018-11-07 18:06:33,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:06:33,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2018-11-07 18:06:33,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:33,098 INFO L225 Difference]: With dead ends: 7944 [2018-11-07 18:06:33,098 INFO L226 Difference]: Without dead ends: 5836 [2018-11-07 18:06:33,125 INFO L604 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 [2018-11-07 18:06:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2018-11-07 18:06:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 5834. [2018-11-07 18:06:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5834 states. [2018-11-07 18:06:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5834 states to 5834 states and 8173 transitions. [2018-11-07 18:06:33,337 INFO L78 Accepts]: Start accepts. Automaton has 5834 states and 8173 transitions. Word has length 106 [2018-11-07 18:06:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:33,338 INFO L480 AbstractCegarLoop]: Abstraction has 5834 states and 8173 transitions. [2018-11-07 18:06:33,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:06:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 5834 states and 8173 transitions. [2018-11-07 18:06:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-07 18:06:33,357 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:33,357 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:33,358 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:33,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:33,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1121522118, now seen corresponding path program 1 times [2018-11-07 18:06:33,358 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:33,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:33,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:33,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:33,360 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:06:33,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:33,660 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:33,661 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 196 with the following transitions: [2018-11-07 18:06:33,663 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [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], [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], [707], [711], [714], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:06:33,716 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:33,716 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:34,260 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:06:34,262 INFO L272 AbstractInterpreter]: Visited 105 different actions 105 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 18:06:34,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:34,306 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:06:34,808 INFO L227 lantSequenceWeakener]: Weakened 186 states. On average, predicates are now at 77.43% of their original sizes. [2018-11-07 18:06:34,808 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:06:35,294 INFO L415 sIntCurrentIteration]: We unified 194 AI predicates to 194 [2018-11-07 18:06:35,294 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:06:35,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:06:35,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-11-07 18:06:35,296 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:35,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:06:35,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:06:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:06:35,297 INFO L87 Difference]: Start difference. First operand 5834 states and 8173 transitions. Second operand 8 states. [2018-11-07 18:06:38,225 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:07,850 INFO L93 Difference]: Finished difference Result 11972 states and 16730 transitions. [2018-11-07 18:07:07,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 18:07:07,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 195 [2018-11-07 18:07:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:07,881 INFO L225 Difference]: With dead ends: 11972 [2018-11-07 18:07:07,882 INFO L226 Difference]: Without dead ends: 6144 [2018-11-07 18:07:07,911 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 196 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:07:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6144 states. [2018-11-07 18:07:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6144 to 6142. [2018-11-07 18:07:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6142 states. [2018-11-07 18:07:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 8490 transitions. [2018-11-07 18:07:08,061 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 8490 transitions. Word has length 195 [2018-11-07 18:07:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:08,062 INFO L480 AbstractCegarLoop]: Abstraction has 6142 states and 8490 transitions. [2018-11-07 18:07:08,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:07:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 8490 transitions. [2018-11-07 18:07:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-11-07 18:07:08,072 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:08,072 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:08,073 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:08,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash 138024112, now seen corresponding path program 1 times [2018-11-07 18:07:08,073 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:08,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:08,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:08,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:08,075 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:08,388 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:07:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 60 proven. 212 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-07 18:07:08,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:08,485 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:08,486 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 292 with the following transitions: [2018-11-07 18:07:08,486 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [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], [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], [691], [692], [696], [707], [711], [714], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:07:08,491 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:08,491 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:08,561 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:09,107 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:07:09,107 INFO L272 AbstractInterpreter]: Visited 109 different actions 727 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:07:09,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:09,145 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:07:09,637 INFO L227 lantSequenceWeakener]: Weakened 68 states. On average, predicates are now at 78.07% of their original sizes. [2018-11-07 18:07:09,637 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:07:10,556 INFO L415 sIntCurrentIteration]: We unified 290 AI predicates to 290 [2018-11-07 18:07:10,557 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:07:10,557 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:07:10,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-11-07 18:07:10,558 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:07:10,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 18:07:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 18:07:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:07:10,559 INFO L87 Difference]: Start difference. First operand 6142 states and 8490 transitions. Second operand 19 states. [2018-11-07 18:07:53,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:53,112 INFO L93 Difference]: Finished difference Result 13412 states and 18385 transitions. [2018-11-07 18:07:53,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-07 18:07:53,112 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 291 [2018-11-07 18:07:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:53,146 INFO L225 Difference]: With dead ends: 13412 [2018-11-07 18:07:53,147 INFO L226 Difference]: Without dead ends: 7584 [2018-11-07 18:07:53,177 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 304 GetRequests, 270 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2018-11-07 18:07:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7584 states. [2018-11-07 18:07:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7584 to 7075. [2018-11-07 18:07:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7075 states. [2018-11-07 18:07:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7075 states to 7075 states and 9462 transitions. [2018-11-07 18:07:53,348 INFO L78 Accepts]: Start accepts. Automaton has 7075 states and 9462 transitions. Word has length 291 [2018-11-07 18:07:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:53,349 INFO L480 AbstractCegarLoop]: Abstraction has 7075 states and 9462 transitions. [2018-11-07 18:07:53,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 18:07:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 7075 states and 9462 transitions. [2018-11-07 18:07:53,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-11-07 18:07:53,361 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:53,361 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:53,362 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:53,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:53,362 INFO L82 PathProgramCache]: Analyzing trace with hash -983454560, now seen corresponding path program 1 times [2018-11-07 18:07:53,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:53,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:53,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:53,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:53,364 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:54,163 WARN L179 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2018-11-07 18:07:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 18:07:55,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:55,481 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:55,481 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 383 with the following transitions: [2018-11-07 18:07:55,489 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [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], [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], [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], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1562], [1566], [1570], [1581], [1585], [1589], [1593], [1597], [1601], [1612], [1616], [1620], [1623], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:07:55,505 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:55,505 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:55,797 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:56,374 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:56,374 INFO L272 AbstractInterpreter]: Visited 296 different actions 885 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:07:56,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:56,384 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:56,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:56,384 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:56,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:56,396 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:56,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:08:21,530 WARN L179 SmtUtils]: Spent 24.57 s on a formula simplification. DAG size of input: 472 DAG size of output: 156 [2018-11-07 18:08:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 18:08:22,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:08:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 18:08:22,579 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 18:08:22,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-11-07 18:08:22,580 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:08:22,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:08:22,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:08:22,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:08:22,583 INFO L87 Difference]: Start difference. First operand 7075 states and 9462 transitions. Second operand 3 states. [2018-11-07 18:08:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:08:25,823 INFO L93 Difference]: Finished difference Result 19393 states and 27180 transitions. [2018-11-07 18:08:25,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:08:25,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2018-11-07 18:08:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:08:25,887 INFO L225 Difference]: With dead ends: 19393 [2018-11-07 18:08:25,887 INFO L226 Difference]: Without dead ends: 9497 [2018-11-07 18:08:25,996 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 761 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:08:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2018-11-07 18:08:26,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 9497. [2018-11-07 18:08:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9497 states. [2018-11-07 18:08:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9497 states to 9497 states and 12013 transitions. [2018-11-07 18:08:26,277 INFO L78 Accepts]: Start accepts. Automaton has 9497 states and 12013 transitions. Word has length 382 [2018-11-07 18:08:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:08:26,278 INFO L480 AbstractCegarLoop]: Abstraction has 9497 states and 12013 transitions. [2018-11-07 18:08:26,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:08:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 9497 states and 12013 transitions. [2018-11-07 18:08:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2018-11-07 18:08:26,311 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:08:26,311 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:08:26,312 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:08:26,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:26,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1057795027, now seen corresponding path program 1 times [2018-11-07 18:08:26,312 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:08:26,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:26,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:26,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:26,315 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:08:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 182 proven. 72 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 18:08:28,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:28,404 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:08:28,405 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 513 with the following transitions: [2018-11-07 18:08:28,405 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [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], [585], [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], [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], [842], [847], [849], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1562], [1566], [1570], [1581], [1585], [1589], [1593], [1597], [1601], [1612], [1616], [1620], [1623], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:08:28,412 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:08:28,412 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:08:28,984 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:08:28,984 INFO L272 AbstractInterpreter]: Visited 296 different actions 586 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:08:29,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:29,010 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:08:29,817 INFO L227 lantSequenceWeakener]: Weakened 105 states. On average, predicates are now at 79.72% of their original sizes. [2018-11-07 18:08:29,817 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:08:30,408 INFO L415 sIntCurrentIteration]: We unified 511 AI predicates to 511 [2018-11-07 18:08:30,409 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:08:30,409 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:08:30,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [6] total 25 [2018-11-07 18:08:30,410 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:08:30,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 18:08:30,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 18:08:30,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:08:30,413 INFO L87 Difference]: Start difference. First operand 9497 states and 12013 transitions. Second operand 21 states. [2018-11-07 18:08:37,207 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:09:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:09:08,296 INFO L93 Difference]: Finished difference Result 18990 states and 24203 transitions. [2018-11-07 18:09:08,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 18:09:08,297 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 512 [2018-11-07 18:09:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:09:08,340 INFO L225 Difference]: With dead ends: 18990 [2018-11-07 18:09:08,340 INFO L226 Difference]: Without dead ends: 10414 [2018-11-07 18:09:08,371 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 526 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2018-11-07 18:09:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2018-11-07 18:09:08,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 9807. [2018-11-07 18:09:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9807 states. [2018-11-07 18:09:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9807 states to 9807 states and 12331 transitions. [2018-11-07 18:09:08,581 INFO L78 Accepts]: Start accepts. Automaton has 9807 states and 12331 transitions. Word has length 512 [2018-11-07 18:09:08,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:09:08,582 INFO L480 AbstractCegarLoop]: Abstraction has 9807 states and 12331 transitions. [2018-11-07 18:09:08,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 18:09:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9807 states and 12331 transitions. [2018-11-07 18:09:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2018-11-07 18:09:08,608 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:08,609 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:09:08,609 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:08,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:08,610 INFO L82 PathProgramCache]: Analyzing trace with hash -709305353, now seen corresponding path program 1 times [2018-11-07 18:09:08,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:08,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:08,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:08,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:08,611 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2018-11-07 18:09:09,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:09:09,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:09:09,180 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:09:09,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:09:09,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:09:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:09:09,182 INFO L87 Difference]: Start difference. First operand 9807 states and 12331 transitions. Second operand 3 states. [2018-11-07 18:09:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:09:11,944 INFO L93 Difference]: Finished difference Result 23317 states and 30824 transitions. [2018-11-07 18:09:11,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:09:11,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 527 [2018-11-07 18:09:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:09:12,000 INFO L225 Difference]: With dead ends: 23317 [2018-11-07 18:09:12,000 INFO L226 Difference]: Without dead ends: 14741 [2018-11-07 18:09:12,042 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:09:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14741 states. [2018-11-07 18:09:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14741 to 14741. [2018-11-07 18:09:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14741 states. [2018-11-07 18:09:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14741 states to 14741 states and 18780 transitions. [2018-11-07 18:09:12,338 INFO L78 Accepts]: Start accepts. Automaton has 14741 states and 18780 transitions. Word has length 527 [2018-11-07 18:09:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:09:12,339 INFO L480 AbstractCegarLoop]: Abstraction has 14741 states and 18780 transitions. [2018-11-07 18:09:12,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:09:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 14741 states and 18780 transitions. [2018-11-07 18:09:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2018-11-07 18:09:12,367 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:12,368 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:09:12,368 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:12,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1887349557, now seen corresponding path program 1 times [2018-11-07 18:09:12,368 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:12,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:12,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:12,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:12,370 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:13,356 WARN L179 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-11-07 18:09:13,797 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-07 18:09:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 386 proven. 32 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-11-07 18:09:14,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:14,723 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:09:14,724 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 562 with the following transitions: [2018-11-07 18:09:14,724 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [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], [585], [586], [590], [594], [597], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:09:14,732 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:09:14,732 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:09:14,806 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:09:15,835 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:09:15,836 INFO L272 AbstractInterpreter]: Visited 286 different actions 1129 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:09:15,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:15,844 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:09:15,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:15,844 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:09:15,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:15,853 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:09:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:16,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:09:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 425 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-07 18:09:16,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:09:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 235 proven. 72 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-11-07 18:09:16,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:09:16,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-11-07 18:09:16,823 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:09:16,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:09:16,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:09:16,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:09:16,825 INFO L87 Difference]: Start difference. First operand 14741 states and 18780 transitions. Second operand 10 states. [2018-11-07 18:09:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:09:28,156 INFO L93 Difference]: Finished difference Result 47421 states and 66277 transitions. [2018-11-07 18:09:28,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-07 18:09:28,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 561 [2018-11-07 18:09:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:09:28,303 INFO L225 Difference]: With dead ends: 47421 [2018-11-07 18:09:28,303 INFO L226 Difference]: Without dead ends: 33911 [2018-11-07 18:09:28,389 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1179 GetRequests, 1143 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2018-11-07 18:09:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33911 states. [2018-11-07 18:09:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33911 to 32923. [2018-11-07 18:09:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32923 states. [2018-11-07 18:09:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32923 states to 32923 states and 42678 transitions. [2018-11-07 18:09:29,080 INFO L78 Accepts]: Start accepts. Automaton has 32923 states and 42678 transitions. Word has length 561 [2018-11-07 18:09:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:09:29,081 INFO L480 AbstractCegarLoop]: Abstraction has 32923 states and 42678 transitions. [2018-11-07 18:09:29,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:09:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 32923 states and 42678 transitions. [2018-11-07 18:09:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2018-11-07 18:09:29,125 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:29,126 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:09:29,126 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:29,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:29,127 INFO L82 PathProgramCache]: Analyzing trace with hash -328000747, now seen corresponding path program 1 times [2018-11-07 18:09:29,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:29,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:29,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:29,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:29,128 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 386 proven. 2 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2018-11-07 18:09:30,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:30,101 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:09:30,101 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 633 with the following transitions: [2018-11-07 18:09:30,102 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [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], [566], [567], [571], [582], [585], [586], [590], [594], [598], [601], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:09:30,107 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:09:30,108 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:09:30,154 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:09:34,897 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:09:34,897 INFO L272 AbstractInterpreter]: Visited 287 different actions 4335 times. Merged at 10 different actions 186 times. Widened at 1 different actions 10 times. Found 53 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:09:34,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:34,907 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:09:34,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:34,907 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:09:34,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:34,917 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:09:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:35,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:09:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 386 proven. 2 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2018-11-07 18:09:35,670 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:09:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 386 proven. 2 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2018-11-07 18:09:36,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:09:36,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2018-11-07 18:09:36,043 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:09:36,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:09:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:09:36,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:09:36,045 INFO L87 Difference]: Start difference. First operand 32923 states and 42678 transitions. Second operand 6 states. Received shutdown request... [2018-11-07 18:09:37,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:09:37,882 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:09:37,887 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:09:37,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:09:37 BoogieIcfgContainer [2018-11-07 18:09:37,888 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:09:37,888 INFO L168 Benchmark]: Toolchain (without parser) took 212093.08 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.0 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -724.0 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-11-07 18:09:37,889 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:09:37,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1277.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 97.9 MB). Peak memory consumption was 97.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:09:37,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 266.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 789.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -935.6 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:09:37,892 INFO L168 Benchmark]: Boogie Preprocessor took 174.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:09:37,892 INFO L168 Benchmark]: RCFGBuilder took 5623.70 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 284.8 MB). Peak memory consumption was 284.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:09:37,893 INFO L168 Benchmark]: TraceAbstraction took 204746.22 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -184.9 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-07 18:09:37,898 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1277.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 97.9 MB). Peak memory consumption was 97.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 266.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 789.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -935.6 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 174.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5623.70 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 284.8 MB). Peak memory consumption was 284.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204746.22 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -184.9 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 61). Cancelled while BasicCegarLoop was constructing difference of abstraction (32923states) and FLOYD_HOARE automaton (currently 9 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (8503 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 204.6s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 151.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3946 SDtfs, 21142 SDslu, 2975 SDs, 0 SdLazy, 26742 SolverSat, 5520 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.2s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 4281 GetRequests, 4133 SyntacticMatches, 14 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 31.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32923occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 8.7s AbstIntTime, 6 AbstIntIterations, 3 AbstIntStrong, 0.997401977643575 AbsIntWeakeningRatio, 0.09045226130653267 AbsIntAvgWeakeningVarsNumRemoved, 17.01608040201005 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 2178 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 32.6s InterpolantComputationTime, 4904 NumberOfCodeBlocks, 4904 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 6463 ConstructedInterpolants, 21 QuantifiedInterpolants, 7318556 SizeOfPredicates, 4 NumberOfNonLiveVariables, 2308 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 5168/5698 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown