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_label44_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:30:47,070 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:30:47,072 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:30:47,088 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:30:47,088 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:30:47,089 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:30:47,090 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:30:47,092 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:30:47,094 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:30:47,095 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:30:47,096 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:30:47,096 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:30:47,097 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:30:47,098 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:30:47,100 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:30:47,100 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:30:47,101 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:30:47,104 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:30:47,106 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:30:47,114 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:30:47,115 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:30:47,116 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:30:47,125 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:30:47,126 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:30:47,126 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:30:47,129 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:30:47,130 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:30:47,131 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:30:47,131 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:30:47,134 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:30:47,134 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:30:47,135 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:30:47,135 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:30:47,135 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:30:47,138 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:30:47,139 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:30:47,140 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 16:30:47,159 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:30:47,159 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:30:47,162 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:30:47,162 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:30:47,163 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:30:47,163 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:30:47,163 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:30:47,163 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:30:47,164 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:30:47,164 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:30:47,164 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:30:47,164 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:30:47,164 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:30:47,165 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:30:47,165 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:30:47,166 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:30:47,167 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:30:47,167 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:30:47,167 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:30:47,167 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:30:47,168 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:30:47,168 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:30:47,168 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:30:47,168 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:30:47,169 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:30:47,169 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:30:47,169 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:30:47,169 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:30:47,170 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:30:47,170 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:30:47,170 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:30:47,170 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:30:47,170 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:30:47,171 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:30:47,171 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:30:47,243 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:30:47,259 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:30:47,262 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:30:47,264 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:30:47,264 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:30:47,265 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label44_false-unreach-call_false-termination.c [2018-11-12 16:30:47,329 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efeb1d7fa/0bc40891fee140f99b1cd13e4ebd20cd/FLAGe927fcef7 [2018-11-12 16:30:47,878 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:30:47,880 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label44_false-unreach-call_false-termination.c [2018-11-12 16:30:47,912 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efeb1d7fa/0bc40891fee140f99b1cd13e4ebd20cd/FLAGe927fcef7 [2018-11-12 16:30:47,938 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efeb1d7fa/0bc40891fee140f99b1cd13e4ebd20cd [2018-11-12 16:30:47,950 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:30:47,952 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:30:47,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:30:47,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:30:47,957 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:30:47,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:30:47" (1/1) ... [2018-11-12 16:30:47,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1505bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:47, skipping insertion in model container [2018-11-12 16:30:47,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:30:47" (1/1) ... [2018-11-12 16:30:47,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:30:48,061 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:30:48,612 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:30:48,620 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:30:48,787 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:30:48,805 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:30:48,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48 WrapperNode [2018-11-12 16:30:48,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:30:48,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:30:48,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:30:48,807 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:30:48,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (1/1) ... [2018-11-12 16:30:48,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (1/1) ... [2018-11-12 16:30:48,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:30:48,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:30:48,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:30:48,956 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:30:48,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (1/1) ... [2018-11-12 16:30:48,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (1/1) ... [2018-11-12 16:30:48,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (1/1) ... [2018-11-12 16:30:48,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (1/1) ... [2018-11-12 16:30:49,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (1/1) ... [2018-11-12 16:30:49,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (1/1) ... [2018-11-12 16:30:49,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (1/1) ... [2018-11-12 16:30:49,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:30:49,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:30:49,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:30:49,083 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:30:49,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (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 16:30:49,158 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:30:49,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:30:49,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:30:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:30:49,160 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:30:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:30:49,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:30:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:30:49,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:30:52,702 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:30:52,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:30:52 BoogieIcfgContainer [2018-11-12 16:30:52,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:30:52,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:30:52,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:30:52,708 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:30:52,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:30:47" (1/3) ... [2018-11-12 16:30:52,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@912909e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:30:52, skipping insertion in model container [2018-11-12 16:30:52,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:48" (2/3) ... [2018-11-12 16:30:52,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@912909e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:30:52, skipping insertion in model container [2018-11-12 16:30:52,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:30:52" (3/3) ... [2018-11-12 16:30:52,712 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label44_false-unreach-call_false-termination.c [2018-11-12 16:30:52,722 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:30:52,730 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:30:52,746 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:30:52,787 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:30:52,788 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:30:52,788 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:30:52,788 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:30:52,788 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:30:52,788 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:30:52,789 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:30:52,789 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:30:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 16:30:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-12 16:30:52,824 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:52,825 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:52,827 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:52,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:52,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1864594988, now seen corresponding path program 1 times [2018-11-12 16:30:52,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:52,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:52,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:52,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:52,892 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:53,222 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 16:30:53,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:30:53,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:30:53,224 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:53,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:30:53,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:30:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:30:53,253 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-12 16:30:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:56,123 INFO L93 Difference]: Finished difference Result 894 states and 1610 transitions. [2018-11-12 16:30:56,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:30:56,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-11-12 16:30:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:56,149 INFO L225 Difference]: With dead ends: 894 [2018-11-12 16:30:56,149 INFO L226 Difference]: Without dead ends: 633 [2018-11-12 16:30:56,158 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:30:56,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-11-12 16:30:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2018-11-12 16:30:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-12 16:30:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 662 transitions. [2018-11-12 16:30:56,243 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 662 transitions. Word has length 18 [2018-11-12 16:30:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:56,244 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 662 transitions. [2018-11-12 16:30:56,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:30:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 662 transitions. [2018-11-12 16:30:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-12 16:30:56,250 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:56,250 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:56,251 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:56,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:56,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2115592732, now seen corresponding path program 1 times [2018-11-12 16:30:56,252 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:56,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:56,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:56,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:56,253 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:30:56,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:30:56,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:30:56,540 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:56,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:30:56,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:30:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:30:56,543 INFO L87 Difference]: Start difference. First operand 434 states and 662 transitions. Second operand 4 states. [2018-11-12 16:30:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:59,387 INFO L93 Difference]: Finished difference Result 1594 states and 2534 transitions. [2018-11-12 16:30:59,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:30:59,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2018-11-12 16:30:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:59,401 INFO L225 Difference]: With dead ends: 1594 [2018-11-12 16:30:59,401 INFO L226 Difference]: Without dead ends: 780 [2018-11-12 16:30:59,408 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 16:30:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2018-11-12 16:30:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2018-11-12 16:30:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-11-12 16:30:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1153 transitions. [2018-11-12 16:30:59,482 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1153 transitions. Word has length 102 [2018-11-12 16:30:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:59,482 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 1153 transitions. [2018-11-12 16:30:59,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:30:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1153 transitions. [2018-11-12 16:30:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-11-12 16:30:59,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:59,490 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:59,490 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:59,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1798704196, now seen corresponding path program 1 times [2018-11-12 16:30:59,491 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:59,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:59,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:59,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:59,494 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:31:00,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:31:00,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 16:31:00,008 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:00,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:31:00,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:31:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:31:00,010 INFO L87 Difference]: Start difference. First operand 780 states and 1153 transitions. Second operand 7 states. [2018-11-12 16:31:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:04,551 INFO L93 Difference]: Finished difference Result 2309 states and 3537 transitions. [2018-11-12 16:31:04,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:31:04,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2018-11-12 16:31:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:04,567 INFO L225 Difference]: With dead ends: 2309 [2018-11-12 16:31:04,568 INFO L226 Difference]: Without dead ends: 1535 [2018-11-12 16:31:04,578 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-11-12 16:31:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2018-11-12 16:31:04,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1471. [2018-11-12 16:31:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2018-11-12 16:31:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2125 transitions. [2018-11-12 16:31:04,652 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2125 transitions. Word has length 114 [2018-11-12 16:31:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:04,653 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 2125 transitions. [2018-11-12 16:31:04,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:31:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2125 transitions. [2018-11-12 16:31:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-11-12 16:31:04,663 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:04,664 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:31:04,664 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:04,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:04,664 INFO L82 PathProgramCache]: Analyzing trace with hash 47001231, now seen corresponding path program 1 times [2018-11-12 16:31:04,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:04,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:04,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:04,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:04,669 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:31:04,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:04,974 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:04,975 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 186 with the following transitions: [2018-11-12 16:31:04,977 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:05,034 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:05,035 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:05,644 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:05,646 INFO L272 AbstractInterpreter]: Visited 101 different actions 101 times. Never merged. Never widened. Performed 838 root evaluator evaluations with a maximum evaluation depth of 6. Performed 838 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 16:31:05,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:05,682 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:06,164 INFO L227 lantSequenceWeakener]: Weakened 176 states. On average, predicates are now at 77.26% of their original sizes. [2018-11-12 16:31:06,164 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:31:06,486 INFO L415 sIntCurrentIteration]: We unified 184 AI predicates to 184 [2018-11-12 16:31:06,487 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:31:06,487 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:31:06,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2018-11-12 16:31:06,488 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:06,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:31:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:31:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:31:06,489 INFO L87 Difference]: Start difference. First operand 1471 states and 2125 transitions. Second operand 7 states. [2018-11-12 16:31:09,138 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:24,850 INFO L93 Difference]: Finished difference Result 3121 states and 4465 transitions. [2018-11-12 16:31:24,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:31:24,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 185 [2018-11-12 16:31:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:24,858 INFO L225 Difference]: With dead ends: 3121 [2018-11-12 16:31:24,858 INFO L226 Difference]: Without dead ends: 1656 [2018-11-12 16:31:24,862 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 185 GetRequests, 179 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 16:31:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2018-11-12 16:31:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1654. [2018-11-12 16:31:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1654 states. [2018-11-12 16:31:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2316 transitions. [2018-11-12 16:31:24,912 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2316 transitions. Word has length 185 [2018-11-12 16:31:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:24,913 INFO L480 AbstractCegarLoop]: Abstraction has 1654 states and 2316 transitions. [2018-11-12 16:31:24,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:31:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2316 transitions. [2018-11-12 16:31:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-11-12 16:31:24,917 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:24,920 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:31:24,921 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:24,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:24,921 INFO L82 PathProgramCache]: Analyzing trace with hash -489192109, now seen corresponding path program 1 times [2018-11-12 16:31:24,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:24,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:24,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:24,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:24,926 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:25,472 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:31:25,661 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:31:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:31:26,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:26,174 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:26,174 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 200 with the following transitions: [2018-11-12 16:31:26,175 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:26,180 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:26,180 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:26,450 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:26,450 INFO L272 AbstractInterpreter]: Visited 104 different actions 201 times. Merged at 4 different actions 4 times. Never widened. Performed 1944 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1944 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 16:31:26,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:26,489 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:26,912 INFO L227 lantSequenceWeakener]: Weakened 76 states. On average, predicates are now at 77.78% of their original sizes. [2018-11-12 16:31:26,912 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:31:28,325 INFO L415 sIntCurrentIteration]: We unified 198 AI predicates to 198 [2018-11-12 16:31:28,325 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:31:28,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:31:28,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [28] imperfect sequences [12] total 38 [2018-11-12 16:31:28,326 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:28,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-12 16:31:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-12 16:31:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2018-11-12 16:31:28,328 INFO L87 Difference]: Start difference. First operand 1654 states and 2316 transitions. Second operand 28 states. [2018-11-12 16:31:37,645 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:52,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:52,921 INFO L93 Difference]: Finished difference Result 3788 states and 5258 transitions. [2018-11-12 16:31:52,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 16:31:52,922 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 199 [2018-11-12 16:31:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:52,932 INFO L225 Difference]: With dead ends: 3788 [2018-11-12 16:31:52,932 INFO L226 Difference]: Without dead ends: 2507 [2018-11-12 16:31:52,938 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 214 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2018-11-12 16:31:52,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2018-11-12 16:31:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2499. [2018-11-12 16:31:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2499 states. [2018-11-12 16:31:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 3188 transitions. [2018-11-12 16:31:53,002 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 3188 transitions. Word has length 199 [2018-11-12 16:31:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:53,003 INFO L480 AbstractCegarLoop]: Abstraction has 2499 states and 3188 transitions. [2018-11-12 16:31:53,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-12 16:31:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 3188 transitions. [2018-11-12 16:31:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-11-12 16:31:53,009 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:53,009 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2018-11-12 16:31:53,010 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:53,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:53,010 INFO L82 PathProgramCache]: Analyzing trace with hash -146122316, now seen corresponding path program 1 times [2018-11-12 16:31:53,010 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:53,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:53,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:53,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:53,012 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:53,274 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 16:31:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 107 proven. 95 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-12 16:31:53,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:53,681 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:53,681 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 297 with the following transitions: [2018-11-12 16:31:53,682 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:53,686 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:53,686 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:53,877 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:53,877 INFO L272 AbstractInterpreter]: Visited 120 different actions 234 times. Merged at 5 different actions 5 times. Never widened. Performed 2130 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2130 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 16:31:53,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:53,916 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:54,227 INFO L227 lantSequenceWeakener]: Weakened 182 states. On average, predicates are now at 77.6% of their original sizes. [2018-11-12 16:31:54,227 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:31:55,145 INFO L415 sIntCurrentIteration]: We unified 295 AI predicates to 295 [2018-11-12 16:31:55,145 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:31:55,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:31:55,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [6] total 22 [2018-11-12 16:31:55,146 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:55,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:31:55,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:31:55,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:31:55,148 INFO L87 Difference]: Start difference. First operand 2499 states and 3188 transitions. Second operand 18 states. [2018-11-12 16:32:00,493 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:07,768 INFO L93 Difference]: Finished difference Result 4153 states and 5535 transitions. [2018-11-12 16:32:07,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 16:32:07,769 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 296 [2018-11-12 16:32:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:07,779 INFO L225 Difference]: With dead ends: 4153 [2018-11-12 16:32:07,780 INFO L226 Difference]: Without dead ends: 2688 [2018-11-12 16:32:07,785 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 315 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2018-11-12 16:32:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2018-11-12 16:32:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2683. [2018-11-12 16:32:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2683 states. [2018-11-12 16:32:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 3367 transitions. [2018-11-12 16:32:07,849 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 3367 transitions. Word has length 296 [2018-11-12 16:32:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:07,849 INFO L480 AbstractCegarLoop]: Abstraction has 2683 states and 3367 transitions. [2018-11-12 16:32:07,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:32:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 3367 transitions. [2018-11-12 16:32:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-11-12 16:32:07,856 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:07,856 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 16:32:07,856 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:07,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:07,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1774050352, now seen corresponding path program 1 times [2018-11-12 16:32:07,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:07,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:07,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:07,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:07,858 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 121 proven. 95 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-12 16:32:08,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:08,436 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:08,436 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 311 with the following transitions: [2018-11-12 16:32:08,437 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:08,440 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:08,441 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:08,785 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:32:08,786 INFO L272 AbstractInterpreter]: Visited 120 different actions 357 times. Merged at 7 different actions 19 times. Never widened. Performed 5885 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5885 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:32:08,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:08,790 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:32:09,379 INFO L227 lantSequenceWeakener]: Weakened 45 states. On average, predicates are now at 78.12% of their original sizes. [2018-11-12 16:32:09,379 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:32:10,067 INFO L415 sIntCurrentIteration]: We unified 309 AI predicates to 309 [2018-11-12 16:32:10,068 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:32:10,068 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:32:10,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [6] total 28 [2018-11-12 16:32:10,069 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:10,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-12 16:32:10,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-12 16:32:10,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-11-12 16:32:10,071 INFO L87 Difference]: Start difference. First operand 2683 states and 3367 transitions. Second operand 24 states. [2018-11-12 16:32:19,784 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:32,113 INFO L93 Difference]: Finished difference Result 5170 states and 6701 transitions. [2018-11-12 16:32:32,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-12 16:32:32,113 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 310 [2018-11-12 16:32:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:32,126 INFO L225 Difference]: With dead ends: 5170 [2018-11-12 16:32:32,127 INFO L226 Difference]: Without dead ends: 3889 [2018-11-12 16:32:32,132 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 334 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=441, Invalid=1911, Unknown=0, NotChecked=0, Total=2352 [2018-11-12 16:32:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2018-11-12 16:32:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3358. [2018-11-12 16:32:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3358 states. [2018-11-12 16:32:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3358 states to 3358 states and 4081 transitions. [2018-11-12 16:32:32,212 INFO L78 Accepts]: Start accepts. Automaton has 3358 states and 4081 transitions. Word has length 310 [2018-11-12 16:32:32,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:32,213 INFO L480 AbstractCegarLoop]: Abstraction has 3358 states and 4081 transitions. [2018-11-12 16:32:32,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-12 16:32:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3358 states and 4081 transitions. [2018-11-12 16:32:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-11-12 16:32:32,220 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:32,220 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 16:32:32,220 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:32,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:32,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1279348208, now seen corresponding path program 1 times [2018-11-12 16:32:32,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:32,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:32,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:32,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:32,222 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:32,536 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 16:32:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 171 proven. 77 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-12 16:32:33,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:33,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:33,080 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 327 with the following transitions: [2018-11-12 16:32:33,081 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:33,085 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:33,085 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:33,205 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:33,308 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:32:33,309 INFO L272 AbstractInterpreter]: Visited 120 different actions 360 times. Merged at 7 different actions 22 times. Never widened. Performed 3479 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3479 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:32:33,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:33,316 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:32:33,685 INFO L227 lantSequenceWeakener]: Weakened 323 states. On average, predicates are now at 80.03% of their original sizes. [2018-11-12 16:32:33,686 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:32:34,355 INFO L415 sIntCurrentIteration]: We unified 325 AI predicates to 325 [2018-11-12 16:32:34,355 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:32:34,355 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:32:34,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 16:32:34,356 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:34,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:32:34,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:32:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:32:34,357 INFO L87 Difference]: Start difference. First operand 3358 states and 4081 transitions. Second operand 10 states. [2018-11-12 16:32:42,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:42,837 INFO L93 Difference]: Finished difference Result 6087 states and 7717 transitions. [2018-11-12 16:32:42,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:32:42,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 326 [2018-11-12 16:32:42,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:42,852 INFO L225 Difference]: With dead ends: 6087 [2018-11-12 16:32:42,853 INFO L226 Difference]: Without dead ends: 4133 [2018-11-12 16:32:42,859 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 333 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:32:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2018-11-12 16:32:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3921. [2018-11-12 16:32:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3921 states. [2018-11-12 16:32:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 4749 transitions. [2018-11-12 16:32:42,951 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 4749 transitions. Word has length 326 [2018-11-12 16:32:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:42,952 INFO L480 AbstractCegarLoop]: Abstraction has 3921 states and 4749 transitions. [2018-11-12 16:32:42,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:32:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 4749 transitions. [2018-11-12 16:32:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-11-12 16:32:42,963 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:42,963 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:42,964 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:42,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1974145716, now seen corresponding path program 1 times [2018-11-12 16:32:42,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:42,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:42,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:42,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:42,965 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-12 16:32:43,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:43,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:43,539 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 401 with the following transitions: [2018-11-12 16:32:43,540 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:43,543 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:43,543 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:43,592 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:43,909 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:43,909 INFO L272 AbstractInterpreter]: Visited 122 different actions 481 times. Merged at 8 different actions 29 times. Never widened. Performed 5763 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5763 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:32:43,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:43,917 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:43,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:43,917 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 16:32:43,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:43,927 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:44,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-12 16:32:44,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-12 16:32:45,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:45,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 16:32:45,395 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:45,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:32:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:32:45,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-12 16:32:45,396 INFO L87 Difference]: Start difference. First operand 3921 states and 4749 transitions. Second operand 9 states. [2018-11-12 16:32:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:48,399 INFO L93 Difference]: Finished difference Result 8169 states and 10721 transitions. [2018-11-12 16:32:48,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 16:32:48,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 400 [2018-11-12 16:32:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:48,419 INFO L225 Difference]: With dead ends: 8169 [2018-11-12 16:32:48,420 INFO L226 Difference]: Without dead ends: 3130 [2018-11-12 16:32:48,433 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 801 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-11-12 16:32:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2018-11-12 16:32:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 2877. [2018-11-12 16:32:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2877 states. [2018-11-12 16:32:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 3800 transitions. [2018-11-12 16:32:48,523 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 3800 transitions. Word has length 400 [2018-11-12 16:32:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:48,524 INFO L480 AbstractCegarLoop]: Abstraction has 2877 states and 3800 transitions. [2018-11-12 16:32:48,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:32:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 3800 transitions. [2018-11-12 16:32:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-11-12 16:32:48,532 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:48,532 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 16:32:48,532 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:48,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1798873865, now seen corresponding path program 1 times [2018-11-12 16:32:48,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:48,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:48,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:48,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:48,534 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 195 proven. 69 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-11-12 16:32:48,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:48,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:48,862 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 406 with the following transitions: [2018-11-12 16:32:48,862 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [494], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:48,865 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:48,865 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:48,987 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:49,200 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:49,200 INFO L272 AbstractInterpreter]: Visited 122 different actions 481 times. Merged at 8 different actions 29 times. Never widened. Performed 4863 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4863 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:32:49,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:49,208 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:49,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:49,208 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:32:49,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:49,219 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:49,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 435 proven. 2 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-11-12 16:32:49,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 195 proven. 69 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-11-12 16:32:49,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:49,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-12 16:32:49,924 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:49,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:32:49,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:32:49,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:32:49,925 INFO L87 Difference]: Start difference. First operand 2877 states and 3800 transitions. Second operand 10 states. [2018-11-12 16:32:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:54,634 INFO L93 Difference]: Finished difference Result 11144 states and 16689 transitions. [2018-11-12 16:32:54,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-12 16:32:54,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 405 [2018-11-12 16:32:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:54,686 INFO L225 Difference]: With dead ends: 11144 [2018-11-12 16:32:54,687 INFO L226 Difference]: Without dead ends: 8290 [2018-11-12 16:32:54,726 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 822 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2018-11-12 16:32:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2018-11-12 16:32:54,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8216. [2018-11-12 16:32:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8216 states. [2018-11-12 16:32:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 11066 transitions. [2018-11-12 16:32:54,951 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 11066 transitions. Word has length 405 [2018-11-12 16:32:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:54,952 INFO L480 AbstractCegarLoop]: Abstraction has 8216 states and 11066 transitions. [2018-11-12 16:32:54,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:32:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 11066 transitions. [2018-11-12 16:32:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-11-12 16:32:54,961 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:54,961 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 16:32:54,962 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:54,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash -376652964, now seen corresponding path program 1 times [2018-11-12 16:32:54,962 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:54,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:54,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:54,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:54,963 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 333 proven. 161 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-12 16:32:55,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:55,917 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:55,917 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 409 with the following transitions: [2018-11-12 16:32:55,917 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:55,919 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:55,919 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:56,064 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:56,321 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:56,321 INFO L272 AbstractInterpreter]: Visited 122 different actions 601 times. Merged at 8 different actions 38 times. Widened at 1 different actions 1 times. Performed 6117 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6117 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:32:56,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:56,326 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:56,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:56,326 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:32:56,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:56,337 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:56,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-12 16:32:56,801 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-12 16:32:57,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:57,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:32:57,498 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:57,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:32:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:32:57,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:32:57,500 INFO L87 Difference]: Start difference. First operand 8216 states and 11066 transitions. Second operand 17 states. [2018-11-12 16:33:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:04,760 INFO L93 Difference]: Finished difference Result 17229 states and 25077 transitions. [2018-11-12 16:33:04,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-12 16:33:04,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 408 [2018-11-12 16:33:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:04,826 INFO L225 Difference]: With dead ends: 17229 [2018-11-12 16:33:04,826 INFO L226 Difference]: Without dead ends: 8321 [2018-11-12 16:33:04,920 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 827 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=521, Invalid=1735, Unknown=0, NotChecked=0, Total=2256 [2018-11-12 16:33:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8321 states. [2018-11-12 16:33:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8321 to 7630. [2018-11-12 16:33:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7630 states. [2018-11-12 16:33:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7630 states to 7630 states and 9299 transitions. [2018-11-12 16:33:05,165 INFO L78 Accepts]: Start accepts. Automaton has 7630 states and 9299 transitions. Word has length 408 [2018-11-12 16:33:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:05,166 INFO L480 AbstractCegarLoop]: Abstraction has 7630 states and 9299 transitions. [2018-11-12 16:33:05,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:33:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 7630 states and 9299 transitions. [2018-11-12 16:33:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-11-12 16:33:05,173 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:05,173 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 16:33:05,174 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:05,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:05,174 INFO L82 PathProgramCache]: Analyzing trace with hash -425503428, now seen corresponding path program 1 times [2018-11-12 16:33:05,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:05,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:05,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:05,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:05,176 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:05,568 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 16:33:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 251 proven. 137 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-11-12 16:33:06,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:06,095 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:06,095 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 501 with the following transitions: [2018-11-12 16:33:06,095 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [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], [910], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:06,098 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:06,099 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:06,289 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:06,789 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:33:06,789 INFO L272 AbstractInterpreter]: Visited 184 different actions 731 times. Merged at 8 different actions 28 times. Never widened. Performed 9164 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9164 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:33:06,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:06,795 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:33:07,625 INFO L227 lantSequenceWeakener]: Weakened 58 states. On average, predicates are now at 78.5% of their original sizes. [2018-11-12 16:33:07,625 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:33:07,982 INFO L415 sIntCurrentIteration]: We unified 499 AI predicates to 499 [2018-11-12 16:33:07,982 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:33:07,983 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:33:07,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [7] total 25 [2018-11-12 16:33:07,983 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:07,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 16:33:07,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 16:33:07,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:33:07,985 INFO L87 Difference]: Start difference. First operand 7630 states and 9299 transitions. Second operand 20 states. [2018-11-12 16:33:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:20,667 INFO L93 Difference]: Finished difference Result 16153 states and 19757 transitions. [2018-11-12 16:33:20,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-12 16:33:20,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 500 [2018-11-12 16:33:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:20,702 INFO L225 Difference]: With dead ends: 16153 [2018-11-12 16:33:20,702 INFO L226 Difference]: Without dead ends: 9084 [2018-11-12 16:33:20,727 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 514 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-11-12 16:33:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9084 states. [2018-11-12 16:33:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9084 to 8973. [2018-11-12 16:33:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8973 states. [2018-11-12 16:33:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 10581 transitions. [2018-11-12 16:33:20,936 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 10581 transitions. Word has length 500 [2018-11-12 16:33:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:20,936 INFO L480 AbstractCegarLoop]: Abstraction has 8973 states and 10581 transitions. [2018-11-12 16:33:20,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 16:33:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 10581 transitions. [2018-11-12 16:33:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2018-11-12 16:33:20,951 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:20,952 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:20,952 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:20,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash 677214532, now seen corresponding path program 1 times [2018-11-12 16:33:20,953 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:20,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:20,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:20,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:20,954 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 413 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-11-12 16:33:21,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:21,680 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:21,680 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 625 with the following transitions: [2018-11-12 16:33:21,681 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [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], [686], [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 16:33:21,683 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:21,683 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:21,829 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:22,451 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:33:22,452 INFO L272 AbstractInterpreter]: Visited 191 different actions 963 times. Merged at 10 different actions 52 times. Widened at 1 different actions 1 times. Performed 11445 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11445 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:33:22,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:22,461 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:33:23,478 INFO L227 lantSequenceWeakener]: Weakened 621 states. On average, predicates are now at 80.04% of their original sizes. [2018-11-12 16:33:23,478 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:33:23,584 INFO L415 sIntCurrentIteration]: We unified 623 AI predicates to 623 [2018-11-12 16:33:23,584 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:33:23,584 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:33:23,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-12 16:33:23,584 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:23,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:33:23,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:33:23,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:33:23,585 INFO L87 Difference]: Start difference. First operand 8973 states and 10581 transitions. Second operand 10 states. [2018-11-12 16:33:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:29,353 INFO L93 Difference]: Finished difference Result 16965 states and 20303 transitions. [2018-11-12 16:33:29,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:33:29,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 624 [2018-11-12 16:33:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:29,385 INFO L225 Difference]: With dead ends: 16965 [2018-11-12 16:33:29,386 INFO L226 Difference]: Without dead ends: 9448 [2018-11-12 16:33:29,415 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 631 GetRequests, 615 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 16:33:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9448 states. [2018-11-12 16:33:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9448 to 9314. [2018-11-12 16:33:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9314 states. [2018-11-12 16:33:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9314 states to 9314 states and 10735 transitions. [2018-11-12 16:33:29,636 INFO L78 Accepts]: Start accepts. Automaton has 9314 states and 10735 transitions. Word has length 624 [2018-11-12 16:33:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:29,637 INFO L480 AbstractCegarLoop]: Abstraction has 9314 states and 10735 transitions. [2018-11-12 16:33:29,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:33:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 9314 states and 10735 transitions. [2018-11-12 16:33:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2018-11-12 16:33:29,648 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:29,648 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:29,649 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:29,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 795079071, now seen corresponding path program 1 times [2018-11-12 16:33:29,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:29,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:29,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:29,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:29,651 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 413 proven. 95 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-11-12 16:33:31,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:31,062 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:31,062 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 634 with the following transitions: [2018-11-12 16:33:31,062 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [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 16:33:31,066 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:31,066 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:31,353 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:32,044 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:32,044 INFO L272 AbstractInterpreter]: Visited 192 different actions 968 times. Merged at 10 different actions 56 times. Widened at 1 different actions 1 times. Performed 13116 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13116 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:33:32,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:32,053 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:32,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:32,053 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:33:32,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:32,064 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:32,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 770 proven. 2 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-11-12 16:33:32,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:33:32,889 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-12 16:33:32,995 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-12 16:33:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 413 proven. 95 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-11-12 16:33:34,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:34,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:33:34,114 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:34,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:33:34,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:33:34,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:33:34,116 INFO L87 Difference]: Start difference. First operand 9314 states and 10735 transitions. Second operand 7 states. [2018-11-12 16:33:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:36,409 INFO L93 Difference]: Finished difference Result 23943 states and 33843 transitions. [2018-11-12 16:33:36,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:33:36,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 633 [2018-11-12 16:33:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:36,497 INFO L225 Difference]: With dead ends: 23943 [2018-11-12 16:33:36,498 INFO L226 Difference]: Without dead ends: 16085 [2018-11-12 16:33:36,557 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1281 GetRequests, 1268 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:33:36,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16085 states. [2018-11-12 16:33:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16085 to 15039. [2018-11-12 16:33:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15039 states. [2018-11-12 16:33:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15039 states to 15039 states and 18098 transitions. [2018-11-12 16:33:37,008 INFO L78 Accepts]: Start accepts. Automaton has 15039 states and 18098 transitions. Word has length 633 [2018-11-12 16:33:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:37,009 INFO L480 AbstractCegarLoop]: Abstraction has 15039 states and 18098 transitions. [2018-11-12 16:33:37,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:33:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 15039 states and 18098 transitions. [2018-11-12 16:33:37,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2018-11-12 16:33:37,020 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:37,020 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:37,021 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:37,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:37,021 INFO L82 PathProgramCache]: Analyzing trace with hash -494580080, now seen corresponding path program 1 times [2018-11-12 16:33:37,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:37,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:37,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:37,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:37,022 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 412 proven. 540 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2018-11-12 16:33:38,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:38,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:38,842 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 679 with the following transitions: [2018-11-12 16:33:38,842 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [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], [866], [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 16:33:38,844 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:38,845 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:39,073 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:39,764 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:39,765 INFO L272 AbstractInterpreter]: Visited 192 different actions 965 times. Merged at 10 different actions 53 times. Widened at 1 different actions 1 times. Performed 11471 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11471 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:33:39,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:39,771 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:39,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:39,771 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:33:39,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:39,780 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:39,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 815 proven. 2 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-11-12 16:33:40,466 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:33:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 458 proven. 95 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-11-12 16:33:41,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:41,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-12 16:33:41,236 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:41,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:33:41,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:33:41,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:33:41,238 INFO L87 Difference]: Start difference. First operand 15039 states and 18098 transitions. Second operand 17 states. [2018-11-12 16:33:44,632 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-12 16:33:45,309 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-12 16:33:45,517 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2018-11-12 16:33:48,004 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-12 16:33:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:48,552 INFO L93 Difference]: Finished difference Result 34577 states and 42979 transitions. [2018-11-12 16:33:48,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-12 16:33:48,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 678 [2018-11-12 16:33:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:48,625 INFO L225 Difference]: With dead ends: 34577 [2018-11-12 16:33:48,625 INFO L226 Difference]: Without dead ends: 19731 [2018-11-12 16:33:48,696 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1378 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-12 16:33:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19731 states. [2018-11-12 16:33:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19731 to 19655. [2018-11-12 16:33:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19655 states. [2018-11-12 16:33:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19655 states to 19655 states and 23888 transitions. [2018-11-12 16:33:49,208 INFO L78 Accepts]: Start accepts. Automaton has 19655 states and 23888 transitions. Word has length 678 [2018-11-12 16:33:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:49,208 INFO L480 AbstractCegarLoop]: Abstraction has 19655 states and 23888 transitions. [2018-11-12 16:33:49,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:33:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 19655 states and 23888 transitions. [2018-11-12 16:33:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2018-11-12 16:33:49,227 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:49,227 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:33:49,228 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:49,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1614375823, now seen corresponding path program 1 times [2018-11-12 16:33:49,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:49,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:49,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:49,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:49,230 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:50,203 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-11-12 16:33:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 629 proven. 366 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-11-12 16:33:51,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:51,770 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:51,771 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 794 with the following transitions: [2018-11-12 16:33:51,771 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [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], [854], [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 16:33:51,773 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:51,774 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:52,131 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:53,213 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:53,214 INFO L272 AbstractInterpreter]: Visited 193 different actions 1172 times. Merged at 11 different actions 74 times. Widened at 1 different actions 2 times. Performed 15950 root evaluator evaluations with a maximum evaluation depth of 6. Performed 15950 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 20 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:33:53,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:53,220 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:53,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:53,220 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:33:53,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:53,230 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:53,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 1040 proven. 2 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2018-11-12 16:33:54,097 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:33:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 592 proven. 95 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2018-11-12 16:33:54,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:54,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:33:54,704 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:54,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:33:54,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:33:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:33:54,706 INFO L87 Difference]: Start difference. First operand 19655 states and 23888 transitions. Second operand 17 states. [2018-11-12 16:33:58,599 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2018-11-12 16:34:00,786 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2018-11-12 16:34:01,010 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-11-12 16:34:01,178 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2018-11-12 16:34:01,835 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2018-11-12 16:34:05,268 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-11-12 16:34:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:08,112 INFO L93 Difference]: Finished difference Result 39266 states and 57307 transitions. [2018-11-12 16:34:08,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-12 16:34:08,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 793 [2018-11-12 16:34:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:08,247 INFO L225 Difference]: With dead ends: 39266 [2018-11-12 16:34:08,247 INFO L226 Difference]: Without dead ends: 18088 [2018-11-12 16:34:08,367 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1710 GetRequests, 1628 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1268, Invalid=5374, Unknown=0, NotChecked=0, Total=6642 [2018-11-12 16:34:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18088 states. [2018-11-12 16:34:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18088 to 16366. [2018-11-12 16:34:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16366 states. [2018-11-12 16:34:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16366 states to 16366 states and 18740 transitions. [2018-11-12 16:34:08,941 INFO L78 Accepts]: Start accepts. Automaton has 16366 states and 18740 transitions. Word has length 793 [2018-11-12 16:34:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:08,942 INFO L480 AbstractCegarLoop]: Abstraction has 16366 states and 18740 transitions. [2018-11-12 16:34:08,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:34:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 16366 states and 18740 transitions. [2018-11-12 16:34:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2018-11-12 16:34:08,959 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:08,959 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:34:08,960 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:08,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash -604424548, now seen corresponding path program 1 times [2018-11-12 16:34:08,960 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:08,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:08,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:08,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:08,961 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 490 proven. 1333 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2018-11-12 16:34:11,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:11,742 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:11,742 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 969 with the following transitions: [2018-11-12 16:34:11,743 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [45], [47], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [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], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:11,746 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:11,746 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:11,983 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:13,742 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:34:13,742 INFO L272 AbstractInterpreter]: Visited 195 different actions 1190 times. Merged at 13 different actions 80 times. Widened at 1 different actions 3 times. Performed 15992 root evaluator evaluations with a maximum evaluation depth of 6. Performed 15992 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 26 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:34:13,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:13,744 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:34:13,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:13,744 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:34:13,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:13,755 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:34:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:13,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 741 proven. 2 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2018-11-12 16:34:14,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:14,660 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-11-12 16:34:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 741 proven. 2 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2018-11-12 16:34:15,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:34:15,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-12 16:34:15,780 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:34:15,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:34:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:34:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:34:15,782 INFO L87 Difference]: Start difference. First operand 16366 states and 18740 transitions. Second operand 18 states. [2018-11-12 16:34:17,918 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-11-12 16:34:18,821 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2018-11-12 16:34:22,296 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2018-11-12 16:34:22,895 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2018-11-12 16:34:23,062 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2018-11-12 16:34:23,945 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 Received shutdown request... [2018-11-12 16:34:24,223 WARN L187 SmtUtils]: Removed 8 from assertion stack [2018-11-12 16:34:24,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-12 16:34:24,224 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:34:24,231 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:34:24,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:34:24 BoogieIcfgContainer [2018-11-12 16:34:24,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:34:24,233 INFO L168 Benchmark]: Toolchain (without parser) took 216281.72 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -843.1 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-11-12 16:34:24,234 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:34:24,234 INFO L168 Benchmark]: CACSL2BoogieTranslator took 853.01 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-11-12 16:34:24,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 148.34 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -835.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2018-11-12 16:34:24,236 INFO L168 Benchmark]: Boogie Preprocessor took 127.46 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 16:34:24,236 INFO L168 Benchmark]: RCFGBuilder took 3620.21 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: 118.1 MB). Peak memory consumption was 118.1 MB. Max. memory is 7.1 GB. [2018-11-12 16:34:24,237 INFO L168 Benchmark]: TraceAbstraction took 211527.59 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -178.4 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-12 16:34:24,241 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 853.01 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 148.34 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -835.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.46 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 3620.21 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: 118.1 MB). Peak memory consumption was 118.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211527.59 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -178.4 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 37). Cancelled while BasicCegarLoop was constructing difference of abstraction (16366states) and FLOYD_HOARE automaton (currently 50 states, 18 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 211.4s OverallTime, 17 OverallIterations, 9 TraceHistogramMax, 162.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2126 SDtfs, 35737 SDslu, 4172 SDs, 0 SdLazy, 46703 SolverSat, 6619 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.6s Time, PredicateUnifierStatistics: 14 DeclaredPredicates, 11535 GetRequests, 11023 SyntacticMatches, 10 SemanticMatches, 501 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6395 ImplicationChecksByTransitivity, 23.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19655occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.8s AbstIntTime, 14 AbstIntIterations, 7 AbstIntStrong, 0.9969814152210379 AbsIntWeakeningRatio, 0.09453349773941636 AbsIntAvgWeakeningVarsNumRemoved, 16.537196876284423 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 5128 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 11244 NumberOfCodeBlocks, 11244 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 15498 ConstructedInterpolants, 0 QuantifiedInterpolants, 42655384 SizeOfPredicates, 18 NumberOfNonLiveVariables, 6395 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 31 InterpolantComputations, 3 PerfectInterpolantSequences, 24589/28087 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown