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/Problem14_label24_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 19:04:43,198 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 19:04:43,201 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 19:04:43,218 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 19:04:43,219 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 19:04:43,220 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 19:04:43,221 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 19:04:43,223 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 19:04:43,224 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 19:04:43,225 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 19:04:43,226 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 19:04:43,227 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 19:04:43,227 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 19:04:43,228 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 19:04:43,230 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 19:04:43,231 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 19:04:43,231 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 19:04:43,233 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 19:04:43,235 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 19:04:43,237 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 19:04:43,238 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 19:04:43,239 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 19:04:43,242 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 19:04:43,242 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 19:04:43,242 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 19:04:43,243 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 19:04:43,244 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 19:04:43,245 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 19:04:43,246 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 19:04:43,247 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 19:04:43,247 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 19:04:43,248 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 19:04:43,248 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 19:04:43,248 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 19:04:43,249 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 19:04:43,252 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 19:04:43,253 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 [2018-11-12 19:04:43,278 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 19:04:43,279 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 19:04:43,279 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 19:04:43,280 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 19:04:43,280 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 19:04:43,280 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 19:04:43,280 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 19:04:43,280 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 19:04:43,280 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 19:04:43,281 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 19:04:43,281 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 19:04:43,281 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 19:04:43,281 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 19:04:43,282 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 19:04:43,282 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 19:04:43,282 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 19:04:43,282 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 19:04:43,283 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 19:04:43,283 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 19:04:43,283 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 19:04:43,283 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 19:04:43,283 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 19:04:43,284 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 19:04:43,284 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 19:04:43,284 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 19:04:43,284 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:04:43,284 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 19:04:43,285 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 19:04:43,285 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 19:04:43,285 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 19:04:43,285 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 19:04:43,285 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 19:04:43,286 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 19:04:43,286 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 19:04:43,286 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 19:04:43,338 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 19:04:43,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 19:04:43,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 19:04:43,362 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 19:04:43,362 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 19:04:43,363 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24_true-unreach-call_false-termination.c [2018-11-12 19:04:43,437 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6db3283e/0ed2604f3864431b861fe4cd2c33d468/FLAG7f15bfe74 [2018-11-12 19:04:44,088 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 19:04:44,088 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24_true-unreach-call_false-termination.c [2018-11-12 19:04:44,102 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6db3283e/0ed2604f3864431b861fe4cd2c33d468/FLAG7f15bfe74 [2018-11-12 19:04:44,118 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6db3283e/0ed2604f3864431b861fe4cd2c33d468 [2018-11-12 19:04:44,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 19:04:44,134 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 19:04:44,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 19:04:44,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 19:04:44,142 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 19:04:44,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:44,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce92097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44, skipping insertion in model container [2018-11-12 19:04:44,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:44,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 19:04:44,236 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 19:04:44,774 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:04:44,779 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 19:04:44,893 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:04:44,914 INFO L193 MainTranslator]: Completed translation [2018-11-12 19:04:44,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44 WrapperNode [2018-11-12 19:04:44,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 19:04:44,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 19:04:44,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 19:04:44,916 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 19:04:44,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:45,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:45,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 19:04:45,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 19:04:45,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 19:04:45,044 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 19:04:45,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:45,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:45,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:45,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:45,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:45,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:45,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (1/1) ... [2018-11-12 19:04:45,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 19:04:45,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 19:04:45,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 19:04:45,180 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 19:04:45,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (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 [2018-11-12 19:04:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 19:04:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 19:04:45,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 19:04:45,254 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 19:04:45,254 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 19:04:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 19:04:45,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 19:04:45,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 19:04:45,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 19:04:48,718 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 19:04:48,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:04:48 BoogieIcfgContainer [2018-11-12 19:04:48,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 19:04:48,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 19:04:48,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 19:04:48,723 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 19:04:48,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:04:44" (1/3) ... [2018-11-12 19:04:48,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fcc608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:04:48, skipping insertion in model container [2018-11-12 19:04:48,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:04:44" (2/3) ... [2018-11-12 19:04:48,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fcc608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:04:48, skipping insertion in model container [2018-11-12 19:04:48,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:04:48" (3/3) ... [2018-11-12 19:04:48,727 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label24_true-unreach-call_false-termination.c [2018-11-12 19:04:48,738 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 19:04:48,747 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 19:04:48,766 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 19:04:48,811 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 19:04:48,812 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 19:04:48,812 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 19:04:48,812 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 19:04:48,812 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 19:04:48,813 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 19:04:48,813 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 19:04:48,813 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 19:04:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 19:04:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-12 19:04:48,848 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:04:48,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:04:48,853 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:04:48,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash -364363092, now seen corresponding path program 1 times [2018-11-12 19:04:48,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:04:48,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:48,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:04:48,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:48,912 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:04:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:04:49,317 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 19:04:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:04:49,346 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:04:49,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 19:04:49,347 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:04:49,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:04:49,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:04:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:04:49,372 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-12 19:04:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:04:51,122 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-12 19:04:51,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:04:51,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2018-11-12 19:04:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:04:51,146 INFO L225 Difference]: With dead ends: 691 [2018-11-12 19:04:51,146 INFO L226 Difference]: Without dead ends: 434 [2018-11-12 19:04:51,155 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:04:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-12 19:04:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-12 19:04:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-12 19:04:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-12 19:04:51,250 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 48 [2018-11-12 19:04:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:04:51,251 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-12 19:04:51,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 19:04:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-12 19:04:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-12 19:04:51,263 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:04:51,264 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:04:51,264 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:04:51,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash 792460239, now seen corresponding path program 1 times [2018-11-12 19:04:51,265 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:04:51,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:51,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:04:51,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:51,267 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:04:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:04:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:04:51,632 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:04:51,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 19:04:51,632 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:04:51,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 19:04:51,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 19:04:51,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 19:04:51,635 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-12 19:04:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:04:53,773 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-12 19:04:53,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:04:53,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2018-11-12 19:04:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:04:53,780 INFO L225 Difference]: With dead ends: 1062 [2018-11-12 19:04:53,780 INFO L226 Difference]: Without dead ends: 634 [2018-11-12 19:04:53,784 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 19:04:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-12 19:04:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-12 19:04:53,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-12 19:04:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-12 19:04:53,827 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 123 [2018-11-12 19:04:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:04:53,828 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-12 19:04:53,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 19:04:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-12 19:04:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-12 19:04:53,832 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:04:53,833 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:04:53,833 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:04:53,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:53,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1806555924, now seen corresponding path program 1 times [2018-11-12 19:04:53,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:04:53,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:53,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:04:53,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:53,835 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:04:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:04:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:04:54,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:04:54,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:04:54,009 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:04:54,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:04:54,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:04:54,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:04:54,011 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-12 19:04:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:04:57,824 INFO L93 Difference]: Finished difference Result 2348 states and 3999 transitions. [2018-11-12 19:04:57,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:04:57,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2018-11-12 19:04:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:04:57,850 INFO L225 Difference]: With dead ends: 2348 [2018-11-12 19:04:57,850 INFO L226 Difference]: Without dead ends: 1729 [2018-11-12 19:04:57,857 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 [2018-11-12 19:04:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2018-11-12 19:04:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1729. [2018-11-12 19:04:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1729 states. [2018-11-12 19:04:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2669 transitions. [2018-11-12 19:04:57,942 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2669 transitions. Word has length 132 [2018-11-12 19:04:57,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:04:57,944 INFO L480 AbstractCegarLoop]: Abstraction has 1729 states and 2669 transitions. [2018-11-12 19:04:57,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:04:57,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2669 transitions. [2018-11-12 19:04:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-11-12 19:04:57,962 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:04:57,963 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 19:04:57,963 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:04:57,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash 38946104, now seen corresponding path program 1 times [2018-11-12 19:04:57,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:04:57,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:57,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:04:57,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:57,965 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:04:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:04:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 82 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:04:58,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:04:58,514 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:04:58,515 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 237 with the following transitions: [2018-11-12 19:04:58,517 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:04:58,569 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:04:58,570 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:04:59,182 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:04:59,189 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:04:59,192 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Performed 1027 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1027 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 19:04:59,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:59,238 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:04:59,845 INFO L227 lantSequenceWeakener]: Weakened 227 states. On average, predicates are now at 77.86% of their original sizes. [2018-11-12 19:04:59,845 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:05:00,157 INFO L415 sIntCurrentIteration]: We unified 235 AI predicates to 235 [2018-11-12 19:05:00,158 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:05:00,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:05:00,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-12 19:05:00,159 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:05:00,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 19:05:00,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 19:05:00,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 19:05:00,160 INFO L87 Difference]: Start difference. First operand 1729 states and 2669 transitions. Second operand 7 states. [2018-11-12 19:05:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:05:14,993 INFO L93 Difference]: Finished difference Result 3637 states and 5622 transitions. [2018-11-12 19:05:14,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:05:14,993 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 236 [2018-11-12 19:05:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:05:15,004 INFO L225 Difference]: With dead ends: 3637 [2018-11-12 19:05:15,004 INFO L226 Difference]: Without dead ends: 1914 [2018-11-12 19:05:15,013 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:05:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2018-11-12 19:05:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1912. [2018-11-12 19:05:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1912 states. [2018-11-12 19:05:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2860 transitions. [2018-11-12 19:05:15,066 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2860 transitions. Word has length 236 [2018-11-12 19:05:15,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:05:15,066 INFO L480 AbstractCegarLoop]: Abstraction has 1912 states and 2860 transitions. [2018-11-12 19:05:15,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 19:05:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2860 transitions. [2018-11-12 19:05:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-11-12 19:05:15,076 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:05:15,076 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:05:15,077 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:05:15,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:15,077 INFO L82 PathProgramCache]: Analyzing trace with hash 142855015, now seen corresponding path program 1 times [2018-11-12 19:05:15,077 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:05:15,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:15,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:05:15,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:15,079 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:05:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:05:15,634 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:05:15,844 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:05:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 211 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:05:16,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:05:16,409 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:05:16,409 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 322 with the following transitions: [2018-11-12 19:05:16,409 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:05:16,415 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:05:16,416 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:05:16,615 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:05:17,008 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:05:17,009 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Performed 3010 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3010 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:05:17,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:17,047 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:05:18,265 INFO L227 lantSequenceWeakener]: Weakened 68 states. On average, predicates are now at 77.94% of their original sizes. [2018-11-12 19:05:18,266 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:05:20,379 INFO L415 sIntCurrentIteration]: We unified 320 AI predicates to 320 [2018-11-12 19:05:20,380 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:05:20,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:05:20,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [12] total 29 [2018-11-12 19:05:20,380 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:05:20,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-12 19:05:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-12 19:05:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-11-12 19:05:20,383 INFO L87 Difference]: Start difference. First operand 1912 states and 2860 transitions. Second operand 19 states. [2018-11-12 19:05:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:05:46,877 INFO L93 Difference]: Finished difference Result 5187 states and 7888 transitions. [2018-11-12 19:05:46,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-12 19:05:46,877 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 321 [2018-11-12 19:05:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:05:46,895 INFO L225 Difference]: With dead ends: 5187 [2018-11-12 19:05:46,895 INFO L226 Difference]: Without dead ends: 3464 [2018-11-12 19:05:46,905 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2018-11-12 19:05:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2018-11-12 19:05:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3321. [2018-11-12 19:05:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3321 states. [2018-11-12 19:05:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4346 transitions. [2018-11-12 19:05:46,993 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4346 transitions. Word has length 321 [2018-11-12 19:05:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:05:46,994 INFO L480 AbstractCegarLoop]: Abstraction has 3321 states and 4346 transitions. [2018-11-12 19:05:46,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-12 19:05:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4346 transitions. [2018-11-12 19:05:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-11-12 19:05:47,006 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:05:47,007 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:05:47,007 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:05:47,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash 862992339, now seen corresponding path program 1 times [2018-11-12 19:05:47,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:05:47,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:47,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:05:47,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:47,009 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:05:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:05:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 136 proven. 243 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:05:47,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:05:47,978 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:05:47,978 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: [2018-11-12 19:05:47,978 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:05:47,982 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:05:47,983 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:05:48,089 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:05:48,210 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:05:48,210 INFO L272 AbstractInterpreter]: Visited 122 different actions 240 times. Merged at 5 different actions 7 times. Never widened. Performed 3113 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3113 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:05:48,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:48,217 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:05:48,584 INFO L227 lantSequenceWeakener]: Weakened 122 states. On average, predicates are now at 78.79% of their original sizes. [2018-11-12 19:05:48,585 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:05:49,051 INFO L415 sIntCurrentIteration]: We unified 346 AI predicates to 346 [2018-11-12 19:05:49,052 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:05:49,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:05:49,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-12 19:05:49,053 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:05:49,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 19:05:49,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 19:05:49,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-12 19:05:49,055 INFO L87 Difference]: Start difference. First operand 3321 states and 4346 transitions. Second operand 21 states. [2018-11-12 19:06:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:01,389 INFO L93 Difference]: Finished difference Result 5415 states and 7469 transitions. [2018-11-12 19:06:01,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-12 19:06:01,389 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 347 [2018-11-12 19:06:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:01,406 INFO L225 Difference]: With dead ends: 5415 [2018-11-12 19:06:01,406 INFO L226 Difference]: Without dead ends: 3692 [2018-11-12 19:06:01,415 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 363 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=1138, Unknown=0, NotChecked=0, Total=1406 [2018-11-12 19:06:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2018-11-12 19:06:01,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 3506. [2018-11-12 19:06:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3506 states. [2018-11-12 19:06:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 4538 transitions. [2018-11-12 19:06:01,499 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 4538 transitions. Word has length 347 [2018-11-12 19:06:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:01,500 INFO L480 AbstractCegarLoop]: Abstraction has 3506 states and 4538 transitions. [2018-11-12 19:06:01,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 19:06:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 4538 transitions. [2018-11-12 19:06:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-11-12 19:06:01,513 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:01,513 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:06:01,514 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:01,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2106069855, now seen corresponding path program 1 times [2018-11-12 19:06:01,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:01,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:01,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:01,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:01,515 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:02,008 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:06:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 239 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:06:02,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:06:02,745 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:06:02,745 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 358 with the following transitions: [2018-11-12 19:06:02,746 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:06:02,750 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:06:02,750 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:06:02,811 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:06:02,961 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:06:02,961 INFO L272 AbstractInterpreter]: Visited 130 different actions 253 times. Merged at 4 different actions 4 times. Never widened. Performed 3332 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3332 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:06:02,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:02,969 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:06:03,844 INFO L227 lantSequenceWeakener]: Weakened 68 states. On average, predicates are now at 77.94% of their original sizes. [2018-11-12 19:06:03,844 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:06:04,234 INFO L415 sIntCurrentIteration]: We unified 356 AI predicates to 356 [2018-11-12 19:06:04,234 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:06:04,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:06:04,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [12] total 29 [2018-11-12 19:06:04,234 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:04,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-12 19:06:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-12 19:06:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-11-12 19:06:04,236 INFO L87 Difference]: Start difference. First operand 3506 states and 4538 transitions. Second operand 19 states. [2018-11-12 19:06:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:26,702 INFO L93 Difference]: Finished difference Result 6606 states and 9380 transitions. [2018-11-12 19:06:26,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-12 19:06:26,703 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 357 [2018-11-12 19:06:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:26,721 INFO L225 Difference]: With dead ends: 6606 [2018-11-12 19:06:26,722 INFO L226 Difference]: Without dead ends: 4883 [2018-11-12 19:06:26,731 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 365 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2018-11-12 19:06:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2018-11-12 19:06:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 4186. [2018-11-12 19:06:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4186 states. [2018-11-12 19:06:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 5248 transitions. [2018-11-12 19:06:26,850 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 5248 transitions. Word has length 357 [2018-11-12 19:06:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:26,853 INFO L480 AbstractCegarLoop]: Abstraction has 4186 states and 5248 transitions. [2018-11-12 19:06:26,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-12 19:06:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 5248 transitions. [2018-11-12 19:06:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-11-12 19:06:26,871 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:26,872 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:06:26,872 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:26,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:26,872 INFO L82 PathProgramCache]: Analyzing trace with hash 417368004, now seen corresponding path program 1 times [2018-11-12 19:06:26,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:26,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:26,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:26,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:26,874 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 223 proven. 158 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:06:27,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:06:27,898 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:06:27,898 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 383 with the following transitions: [2018-11-12 19:06:27,898 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [798], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:06:27,903 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:06:27,903 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:06:27,981 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:06:28,299 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:06:28,299 INFO L272 AbstractInterpreter]: Visited 155 different actions 303 times. Merged at 4 different actions 4 times. Never widened. Performed 4224 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4224 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:06:28,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:28,337 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:06:28,926 INFO L227 lantSequenceWeakener]: Weakened 99 states. On average, predicates are now at 77.73% of their original sizes. [2018-11-12 19:06:28,926 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:06:29,612 INFO L415 sIntCurrentIteration]: We unified 381 AI predicates to 381 [2018-11-12 19:06:29,612 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:06:29,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:06:29,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [13] total 32 [2018-11-12 19:06:29,613 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:29,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 19:06:29,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 19:06:29,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2018-11-12 19:06:29,614 INFO L87 Difference]: Start difference. First operand 4186 states and 5248 transitions. Second operand 21 states. [2018-11-12 19:06:50,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:50,655 INFO L93 Difference]: Finished difference Result 7283 states and 10089 transitions. [2018-11-12 19:06:50,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 19:06:50,655 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 382 [2018-11-12 19:06:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:50,672 INFO L225 Difference]: With dead ends: 7283 [2018-11-12 19:06:50,672 INFO L226 Difference]: Without dead ends: 5560 [2018-11-12 19:06:50,680 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 389 GetRequests, 356 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:06:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2018-11-12 19:06:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 4862. [2018-11-12 19:06:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4862 states. [2018-11-12 19:06:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4862 states to 4862 states and 5957 transitions. [2018-11-12 19:06:50,795 INFO L78 Accepts]: Start accepts. Automaton has 4862 states and 5957 transitions. Word has length 382 [2018-11-12 19:06:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:50,796 INFO L480 AbstractCegarLoop]: Abstraction has 4862 states and 5957 transitions. [2018-11-12 19:06:50,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 19:06:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4862 states and 5957 transitions. [2018-11-12 19:06:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-11-12 19:06:50,814 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:50,815 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:06:50,815 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:50,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1589592691, now seen corresponding path program 1 times [2018-11-12 19:06:50,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:50,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:50,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:50,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:50,817 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:51,290 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:06:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 210 proven. 171 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:06:52,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:06:52,487 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:06:52,487 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 396 with the following transitions: [2018-11-12 19:06:52,487 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [850], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:06:52,490 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:06:52,491 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:06:52,546 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:06:52,755 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:06:52,756 INFO L272 AbstractInterpreter]: Visited 168 different actions 329 times. Merged at 4 different actions 4 times. Never widened. Performed 4667 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4667 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:06:52,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:52,763 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:06:53,296 INFO L227 lantSequenceWeakener]: Weakened 70 states. On average, predicates are now at 77.92% of their original sizes. [2018-11-12 19:06:53,296 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:06:53,970 INFO L415 sIntCurrentIteration]: We unified 394 AI predicates to 394 [2018-11-12 19:06:53,971 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:06:53,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:06:53,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 30 [2018-11-12 19:06:53,972 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:53,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:06:53,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:06:53,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:06:53,974 INFO L87 Difference]: Start difference. First operand 4862 states and 5957 transitions. Second operand 20 states. [2018-11-12 19:07:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:20,703 INFO L93 Difference]: Finished difference Result 8041 states and 10921 transitions. [2018-11-12 19:07:20,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 19:07:20,703 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 395 [2018-11-12 19:07:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:20,724 INFO L225 Difference]: With dead ends: 8041 [2018-11-12 19:07:20,724 INFO L226 Difference]: Without dead ends: 6318 [2018-11-12 19:07:20,733 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 404 GetRequests, 372 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2018-11-12 19:07:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6318 states. [2018-11-12 19:07:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6318 to 5718. [2018-11-12 19:07:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5718 states. [2018-11-12 19:07:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 6852 transitions. [2018-11-12 19:07:20,844 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 6852 transitions. Word has length 395 [2018-11-12 19:07:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:20,844 INFO L480 AbstractCegarLoop]: Abstraction has 5718 states and 6852 transitions. [2018-11-12 19:07:20,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:07:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 6852 transitions. [2018-11-12 19:07:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-11-12 19:07:20,861 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:20,861 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:07:20,862 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:20,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:20,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1092135653, now seen corresponding path program 1 times [2018-11-12 19:07:20,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:20,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:20,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:20,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:20,864 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:21,330 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:21,525 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:07:21,742 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 198 proven. 183 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:07:22,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:22,519 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:22,520 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 408 with the following transitions: [2018-11-12 19:07:22,520 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [898], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:22,523 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:22,523 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:22,628 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:22,829 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:22,829 INFO L272 AbstractInterpreter]: Visited 180 different actions 356 times. Merged at 5 different actions 7 times. Never widened. Performed 5056 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5056 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:07:22,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:22,836 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:23,283 INFO L227 lantSequenceWeakener]: Weakened 101 states. On average, predicates are now at 77.72% of their original sizes. [2018-11-12 19:07:23,284 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:23,774 INFO L415 sIntCurrentIteration]: We unified 406 AI predicates to 406 [2018-11-12 19:07:23,774 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:23,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:23,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [14] total 35 [2018-11-12 19:07:23,774 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:23,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-12 19:07:23,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-12 19:07:23,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2018-11-12 19:07:23,776 INFO L87 Difference]: Start difference. First operand 5718 states and 6852 transitions. Second operand 23 states. [2018-11-12 19:07:43,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:43,723 INFO L93 Difference]: Finished difference Result 8815 states and 11693 transitions. [2018-11-12 19:07:43,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 19:07:43,723 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 407 [2018-11-12 19:07:43,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:43,740 INFO L225 Difference]: With dead ends: 8815 [2018-11-12 19:07:43,740 INFO L226 Difference]: Without dead ends: 7092 [2018-11-12 19:07:43,749 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 416 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2018-11-12 19:07:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2018-11-12 19:07:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 6392. [2018-11-12 19:07:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6392 states. [2018-11-12 19:07:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6392 states to 6392 states and 7558 transitions. [2018-11-12 19:07:43,859 INFO L78 Accepts]: Start accepts. Automaton has 6392 states and 7558 transitions. Word has length 407 [2018-11-12 19:07:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:43,860 INFO L480 AbstractCegarLoop]: Abstraction has 6392 states and 7558 transitions. [2018-11-12 19:07:43,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-12 19:07:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 6392 states and 7558 transitions. [2018-11-12 19:07:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-11-12 19:07:43,879 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:43,880 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2018-11-12 19:07:43,880 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:43,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:43,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1665507780, now seen corresponding path program 1 times [2018-11-12 19:07:43,881 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:43,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:43,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:43,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:43,882 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 257 proven. 182 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-11-12 19:07:44,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:44,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:44,585 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 433 with the following transitions: [2018-11-12 19:07:44,586 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:44,588 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:44,588 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:44,748 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:44,982 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:44,982 INFO L272 AbstractInterpreter]: Visited 123 different actions 366 times. Merged at 7 different actions 19 times. Never widened. Performed 5362 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5362 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:07:44,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:44,990 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:45,474 INFO L227 lantSequenceWeakener]: Weakened 103 states. On average, predicates are now at 77.32% of their original sizes. [2018-11-12 19:07:45,474 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:45,783 INFO L415 sIntCurrentIteration]: We unified 431 AI predicates to 431 [2018-11-12 19:07:45,783 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:45,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:45,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-11-12 19:07:45,784 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:45,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 19:07:45,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 19:07:45,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-12 19:07:45,785 INFO L87 Difference]: Start difference. First operand 6392 states and 7558 transitions. Second operand 16 states. [2018-11-12 19:08:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:06,246 INFO L93 Difference]: Finished difference Result 12814 states and 15726 transitions. [2018-11-12 19:08:06,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-12 19:08:06,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 432 [2018-11-12 19:08:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:06,264 INFO L225 Difference]: With dead ends: 12814 [2018-11-12 19:08:06,264 INFO L226 Difference]: Without dead ends: 6988 [2018-11-12 19:08:06,280 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 444 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:08:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2018-11-12 19:08:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 6953. [2018-11-12 19:08:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6953 states. [2018-11-12 19:08:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6953 states to 6953 states and 8200 transitions. [2018-11-12 19:08:06,399 INFO L78 Accepts]: Start accepts. Automaton has 6953 states and 8200 transitions. Word has length 432 [2018-11-12 19:08:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:06,400 INFO L480 AbstractCegarLoop]: Abstraction has 6953 states and 8200 transitions. [2018-11-12 19:08:06,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-12 19:08:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 6953 states and 8200 transitions. [2018-11-12 19:08:06,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2018-11-12 19:08:06,421 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:06,422 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:08:06,422 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:06,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:06,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1778676391, now seen corresponding path program 1 times [2018-11-12 19:08:06,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:06,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:06,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:06,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:06,424 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 396 proven. 74 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-12 19:08:07,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:07,042 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:07,042 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 458 with the following transitions: [2018-11-12 19:08:07,042 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:07,044 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:07,044 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:07,137 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:07,330 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:07,331 INFO L272 AbstractInterpreter]: Visited 123 different actions 363 times. Merged at 7 different actions 16 times. Never widened. Performed 4478 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4478 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:08:07,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:07,338 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:07,719 INFO L227 lantSequenceWeakener]: Weakened 454 states. On average, predicates are now at 80.24% of their original sizes. [2018-11-12 19:08:07,720 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:07,804 INFO L415 sIntCurrentIteration]: We unified 456 AI predicates to 456 [2018-11-12 19:08:07,805 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:07,805 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:07,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 19:08:07,805 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:07,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 19:08:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 19:08:07,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 19:08:07,806 INFO L87 Difference]: Start difference. First operand 6953 states and 8200 transitions. Second operand 10 states. [2018-11-12 19:08:15,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:15,609 INFO L93 Difference]: Finished difference Result 10693 states and 13213 transitions. [2018-11-12 19:08:15,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 19:08:15,609 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 457 [2018-11-12 19:08:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:15,628 INFO L225 Difference]: With dead ends: 10693 [2018-11-12 19:08:15,629 INFO L226 Difference]: Without dead ends: 7695 [2018-11-12 19:08:15,638 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 464 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:08:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2018-11-12 19:08:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7315. [2018-11-12 19:08:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7315 states. [2018-11-12 19:08:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 8676 transitions. [2018-11-12 19:08:15,763 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 8676 transitions. Word has length 457 [2018-11-12 19:08:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:15,763 INFO L480 AbstractCegarLoop]: Abstraction has 7315 states and 8676 transitions. [2018-11-12 19:08:15,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 19:08:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 8676 transitions. [2018-11-12 19:08:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2018-11-12 19:08:15,785 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:15,785 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 19:08:15,786 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:15,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:15,786 INFO L82 PathProgramCache]: Analyzing trace with hash 61016408, now seen corresponding path program 1 times [2018-11-12 19:08:15,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:15,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:15,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:15,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:15,787 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 398 proven. 249 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-12 19:08:18,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:18,188 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:18,188 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 525 with the following transitions: [2018-11-12 19:08:18,189 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:18,192 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:18,192 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:18,387 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:19,017 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:08:19,017 INFO L272 AbstractInterpreter]: Visited 191 different actions 954 times. Merged at 9 different actions 47 times. Widened at 1 different actions 2 times. Performed 11416 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11416 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 19:08:19,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:19,028 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:08:19,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:19,028 INFO L192 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 [2018-11-12 19:08:19,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:19,038 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:08:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:19,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:08:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 569 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-11-12 19:08:19,759 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:08:20,287 WARN L179 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2018-11-12 19:08:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 396 proven. 74 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-12 19:08:21,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:08:21,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-12 19:08:21,508 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:08:21,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 19:08:21,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 19:08:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:08:21,510 INFO L87 Difference]: Start difference. First operand 7315 states and 8676 transitions. Second operand 17 states. [2018-11-12 19:08:22,183 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2018-11-12 19:08:25,917 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2018-11-12 19:08:27,720 WARN L179 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-12 19:08:28,130 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-12 19:08:29,733 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 Received shutdown request... [2018-11-12 19:08:29,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-12 19:08:29,938 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 19:08:29,942 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 19:08:29,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 07:08:29 BoogieIcfgContainer [2018-11-12 19:08:29,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 19:08:29,944 INFO L168 Benchmark]: Toolchain (without parser) took 225811.11 ms. Allocated memory was 1.5 GB in the beginning and 4.5 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: -815.6 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-12 19:08:29,945 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-11-12 19:08:29,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 779.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-12 19:08:29,947 INFO L168 Benchmark]: Boogie Procedure Inliner took 127.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -837.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2018-11-12 19:08:29,948 INFO L168 Benchmark]: Boogie Preprocessor took 136.50 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 19:08:29,948 INFO L168 Benchmark]: RCFGBuilder took 3538.71 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.0 MB). Peak memory consumption was 130.0 MB. Max. memory is 7.1 GB. [2018-11-12 19:08:29,951 INFO L168 Benchmark]: TraceAbstraction took 221223.35 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.2 GB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -150.1 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-11-12 19:08:29,957 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 779.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 127.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -837.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.50 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3538.71 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.0 MB). Peak memory consumption was 130.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221223.35 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.2 GB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -150.1 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 127). Cancelled while BasicCegarLoop was constructing difference of abstraction (7315states) and FLOYD_HOARE automaton (currently 39 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 53 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 221.1s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 188.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2563 SDtfs, 29500 SDslu, 2320 SDs, 0 SdLazy, 34950 SolverSat, 5030 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.5s Time, PredicateUnifierStatistics: 18 DeclaredPredicates, 4550 GetRequests, 4252 SyntacticMatches, 13 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7315occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 4.3s AbstIntTime, 10 AbstIntIterations, 9 AbstIntStrong, 0.9972374409827653 AbsIntWeakeningRatio, 0.08842105263157894 AbsIntAvgWeakeningVarsNumRemoved, 13.933834586466165 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 3450 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 4685 NumberOfCodeBlocks, 4685 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 5194 ConstructedInterpolants, 0 QuantifiedInterpolants, 18183639 SizeOfPredicates, 7 NumberOfNonLiveVariables, 784 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 4385/6075 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown