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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label11_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 06:21:15,147 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 06:21:15,149 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 06:21:15,164 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 06:21:15,165 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 06:21:15,166 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 06:21:15,167 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 06:21:15,169 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 06:21:15,171 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 06:21:15,172 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 06:21:15,173 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 06:21:15,174 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 06:21:15,175 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 06:21:15,175 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 06:21:15,177 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 06:21:15,177 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 06:21:15,178 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 06:21:15,180 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 06:21:15,182 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 06:21:15,184 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 06:21:15,185 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 06:21:15,186 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 06:21:15,189 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 06:21:15,189 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 06:21:15,189 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 06:21:15,190 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 06:21:15,191 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 06:21:15,192 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 06:21:15,193 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 06:21:15,194 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 06:21:15,194 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 06:21:15,195 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 06:21:15,197 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 06:21:15,213 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 06:21:15,214 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 06:21:15,215 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 06:21:15,215 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 06:21:15,215 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 06:21:15,215 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 06:21:15,216 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 06:21:15,216 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 06:21:15,216 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 06:21:15,216 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 06:21:15,216 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 06:21:15,217 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 06:21:15,217 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 06:21:15,217 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 06:21:15,218 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 06:21:15,218 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 06:21:15,218 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 06:21:15,218 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 06:21:15,219 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 06:21:15,219 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 06:21:15,219 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 06:21:15,219 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 06:21:15,219 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 06:21:15,220 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 06:21:15,220 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 06:21:15,220 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 06:21:15,220 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 06:21:15,220 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 06:21:15,221 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 06:21:15,221 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 06:21:15,221 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 06:21:15,221 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 06:21:15,221 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 06:21:15,222 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 06:21:15,222 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 06:21:15,222 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 06:21:15,295 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 06:21:15,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 06:21:15,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 06:21:15,317 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 06:21:15,318 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 06:21:15,319 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label11_false-unreach-call_false-termination.c [2018-11-07 06:21:15,388 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f5c0eec8/1beea54b69594bd092270c9e1d3b1614/FLAG619504821 [2018-11-07 06:21:16,028 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 06:21:16,030 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label11_false-unreach-call_false-termination.c [2018-11-07 06:21:16,059 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f5c0eec8/1beea54b69594bd092270c9e1d3b1614/FLAG619504821 [2018-11-07 06:21:16,083 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f5c0eec8/1beea54b69594bd092270c9e1d3b1614 [2018-11-07 06:21:16,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 06:21:16,099 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 06:21:16,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 06:21:16,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 06:21:16,107 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 06:21:16,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:16,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b29a96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16, skipping insertion in model container [2018-11-07 06:21:16,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:16,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 06:21:16,212 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 06:21:16,712 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 06:21:16,717 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 06:21:16,893 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 06:21:16,913 INFO L193 MainTranslator]: Completed translation [2018-11-07 06:21:16,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16 WrapperNode [2018-11-07 06:21:16,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 06:21:16,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 06:21:16,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 06:21:16,915 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 06:21:16,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:17,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:17,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 06:21:17,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 06:21:17,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 06:21:17,098 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 06:21:17,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:17,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:17,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:17,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:17,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:17,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:17,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... [2018-11-07 06:21:17,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 06:21:17,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 06:21:17,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 06:21:17,215 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 06:21:17,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 06:21:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 06:21:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 06:21:17,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 06:21:17,303 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 06:21:17,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 06:21:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 06:21:17,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 06:21:17,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 06:21:17,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 06:21:21,218 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 06:21:21,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:21:21 BoogieIcfgContainer [2018-11-07 06:21:21,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 06:21:21,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 06:21:21,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 06:21:21,224 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 06:21:21,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:21:16" (1/3) ... [2018-11-07 06:21:21,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1cdbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:21:21, skipping insertion in model container [2018-11-07 06:21:21,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:21:16" (2/3) ... [2018-11-07 06:21:21,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1cdbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:21:21, skipping insertion in model container [2018-11-07 06:21:21,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:21:21" (3/3) ... [2018-11-07 06:21:21,227 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label11_false-unreach-call_false-termination.c [2018-11-07 06:21:21,238 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 06:21:21,248 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 06:21:21,267 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 06:21:21,308 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 06:21:21,309 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 06:21:21,309 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 06:21:21,309 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 06:21:21,309 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 06:21:21,309 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 06:21:21,309 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 06:21:21,310 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 06:21:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 06:21:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-07 06:21:21,348 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:21:21,349 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:21:21,352 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:21:21,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:21:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash 177535516, now seen corresponding path program 1 times [2018-11-07 06:21:21,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:21:21,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:21,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:21:21,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:21,419 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:21:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:21:21,815 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-11-07 06:21:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:21:21,826 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:21:21,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 06:21:21,827 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:21:21,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 06:21:21,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 06:21:21,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:21:21,856 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-07 06:21:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:21:24,985 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-11-07 06:21:24,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 06:21:24,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-11-07 06:21:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:21:25,011 INFO L225 Difference]: With dead ends: 894 [2018-11-07 06:21:25,011 INFO L226 Difference]: Without dead ends: 633 [2018-11-07 06:21:25,022 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:21:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-11-07 06:21:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-11-07 06:21:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-11-07 06:21:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 962 transitions. [2018-11-07 06:21:25,152 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 962 transitions. Word has length 28 [2018-11-07 06:21:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:21:25,153 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 962 transitions. [2018-11-07 06:21:25,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 06:21:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 962 transitions. [2018-11-07 06:21:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-07 06:21:25,167 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:21:25,168 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:21:25,168 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:21:25,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:21:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash 578252947, now seen corresponding path program 1 times [2018-11-07 06:21:25,170 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:21:25,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:25,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:21:25,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:25,173 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:21:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:21:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:21:25,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:21:25,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 06:21:25,551 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:21:25,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 06:21:25,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 06:21:25,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:21:25,554 INFO L87 Difference]: Start difference. First operand 633 states and 962 transitions. Second operand 4 states. [2018-11-07 06:21:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:21:29,565 INFO L93 Difference]: Finished difference Result 2358 states and 3741 transitions. [2018-11-07 06:21:29,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 06:21:29,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2018-11-07 06:21:29,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:21:29,586 INFO L225 Difference]: With dead ends: 2358 [2018-11-07 06:21:29,587 INFO L226 Difference]: Without dead ends: 1731 [2018-11-07 06:21:29,594 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:21:29,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-11-07 06:21:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-11-07 06:21:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-11-07 06:21:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2519 transitions. [2018-11-07 06:21:29,703 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2519 transitions. Word has length 141 [2018-11-07 06:21:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:21:29,704 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 2519 transitions. [2018-11-07 06:21:29,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 06:21:29,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2519 transitions. [2018-11-07 06:21:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-11-07 06:21:29,724 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:21:29,725 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:21:29,725 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:21:29,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:21:29,726 INFO L82 PathProgramCache]: Analyzing trace with hash -138677585, now seen corresponding path program 1 times [2018-11-07 06:21:29,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:21:29,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:29,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:21:29,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:29,728 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:21:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:21:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 06:21:30,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:21:30,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 06:21:30,141 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:21:30,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 06:21:30,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 06:21:30,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:21:30,145 INFO L87 Difference]: Start difference. First operand 1731 states and 2519 transitions. Second operand 4 states. [2018-11-07 06:21:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:21:32,903 INFO L93 Difference]: Finished difference Result 5832 states and 9044 transitions. [2018-11-07 06:21:32,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 06:21:32,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 215 [2018-11-07 06:21:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:21:32,950 INFO L225 Difference]: With dead ends: 5832 [2018-11-07 06:21:32,951 INFO L226 Difference]: Without dead ends: 4107 [2018-11-07 06:21:32,969 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:21:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2018-11-07 06:21:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4107. [2018-11-07 06:21:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4107 states. [2018-11-07 06:21:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4107 states to 4107 states and 5921 transitions. [2018-11-07 06:21:33,132 INFO L78 Accepts]: Start accepts. Automaton has 4107 states and 5921 transitions. Word has length 215 [2018-11-07 06:21:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:21:33,133 INFO L480 AbstractCegarLoop]: Abstraction has 4107 states and 5921 transitions. [2018-11-07 06:21:33,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 06:21:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4107 states and 5921 transitions. [2018-11-07 06:21:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-11-07 06:21:33,144 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:21:33,145 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 06:21:33,146 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:21:33,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:21:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash 801110427, now seen corresponding path program 1 times [2018-11-07 06:21:33,146 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:21:33,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:33,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:21:33,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:33,149 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:21:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:21:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:21:33,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:21:33,832 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:21:33,833 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 242 with the following transitions: [2018-11-07 06:21:33,835 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [125], [127], [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], [599], [603], [607], [611], [614], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:21:33,890 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:21:33,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:21:38,168 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 06:21:38,170 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 06:21:38,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:21:38,216 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 06:21:41,596 INFO L227 lantSequenceWeakener]: Weakened 232 states. On average, predicates are now at 77.5% of their original sizes. [2018-11-07 06:21:41,596 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 06:21:41,844 INFO L415 sIntCurrentIteration]: We unified 240 AI predicates to 240 [2018-11-07 06:21:41,844 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 06:21:41,845 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:21:41,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2018-11-07 06:21:41,849 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:21:41,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 06:21:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 06:21:41,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 06:21:41,851 INFO L87 Difference]: Start difference. First operand 4107 states and 5921 transitions. Second operand 6 states. [2018-11-07 06:21:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:21:54,331 INFO L93 Difference]: Finished difference Result 8393 states and 12078 transitions. [2018-11-07 06:21:54,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 06:21:54,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 241 [2018-11-07 06:21:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:21:54,359 INFO L225 Difference]: With dead ends: 8393 [2018-11-07 06:21:54,360 INFO L226 Difference]: Without dead ends: 4292 [2018-11-07 06:21:54,382 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 06:21:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4292 states. [2018-11-07 06:21:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4292 to 4290. [2018-11-07 06:21:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4290 states. [2018-11-07 06:21:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4290 states to 4290 states and 6112 transitions. [2018-11-07 06:21:54,504 INFO L78 Accepts]: Start accepts. Automaton has 4290 states and 6112 transitions. Word has length 241 [2018-11-07 06:21:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:21:54,505 INFO L480 AbstractCegarLoop]: Abstraction has 4290 states and 6112 transitions. [2018-11-07 06:21:54,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 06:21:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4290 states and 6112 transitions. [2018-11-07 06:21:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-11-07 06:21:54,516 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:21:54,517 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:21:54,517 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:21:54,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:21:54,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2059096588, now seen corresponding path program 1 times [2018-11-07 06:21:54,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:21:54,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:54,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:21:54,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:21:54,520 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:21:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:21:55,073 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 06:21:55,284 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 06:21:55,509 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 06:21:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 151 proven. 177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 06:21:56,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:21:56,065 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:21:56,065 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 327 with the following transitions: [2018-11-07 06:21:56,068 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [125], [127], [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], [599], [603], [607], [611], [614], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:21:56,075 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:21:56,075 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:22:00,316 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 06:22:00,317 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 06:22:00,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:22:00,348 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 06:22:02,620 INFO L227 lantSequenceWeakener]: Weakened 323 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-07 06:22:02,621 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 06:22:03,007 INFO L415 sIntCurrentIteration]: We unified 325 AI predicates to 325 [2018-11-07 06:22:03,007 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 06:22:03,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:22:03,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2018-11-07 06:22:03,008 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:22:03,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 06:22:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 06:22:03,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 06:22:03,009 INFO L87 Difference]: Start difference. First operand 4290 states and 6112 transitions. Second operand 10 states. [2018-11-07 06:22:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:22:47,165 INFO L93 Difference]: Finished difference Result 9321 states and 13136 transitions. [2018-11-07 06:22:47,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-07 06:22:47,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 326 [2018-11-07 06:22:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:22:47,192 INFO L225 Difference]: With dead ends: 9321 [2018-11-07 06:22:47,192 INFO L226 Difference]: Without dead ends: 4850 [2018-11-07 06:22:47,213 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 334 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-11-07 06:22:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2018-11-07 06:22:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4848. [2018-11-07 06:22:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4848 states. [2018-11-07 06:22:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4848 states to 4848 states and 6728 transitions. [2018-11-07 06:22:47,339 INFO L78 Accepts]: Start accepts. Automaton has 4848 states and 6728 transitions. Word has length 326 [2018-11-07 06:22:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:22:47,339 INFO L480 AbstractCegarLoop]: Abstraction has 4848 states and 6728 transitions. [2018-11-07 06:22:47,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 06:22:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4848 states and 6728 transitions. [2018-11-07 06:22:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-11-07 06:22:47,351 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:22:47,351 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:22:47,352 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:22:47,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:22:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash 290855395, now seen corresponding path program 1 times [2018-11-07 06:22:47,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:22:47,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:22:47,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:22:47,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:22:47,354 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:22:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:22:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 264 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-11-07 06:22:48,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:22:48,069 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:22:48,069 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 374 with the following transitions: [2018-11-07 06:22:48,070 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [125], [127], [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], [599], [603], [607], [611], [614], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [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], [750], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:22:48,076 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:22:48,076 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:22:48,199 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 06:22:48,199 INFO L272 AbstractInterpreter]: Visited 143 different actions 280 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 06:22:48,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:22:48,237 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 06:22:48,535 INFO L227 lantSequenceWeakener]: Weakened 370 states. On average, predicates are now at 77.49% of their original sizes. [2018-11-07 06:22:48,535 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 06:22:48,776 INFO L415 sIntCurrentIteration]: We unified 372 AI predicates to 372 [2018-11-07 06:22:48,776 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 06:22:48,776 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:22:48,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 06:22:48,777 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:22:48,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 06:22:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 06:22:48,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 06:22:48,779 INFO L87 Difference]: Start difference. First operand 4848 states and 6728 transitions. Second operand 10 states. [2018-11-07 06:23:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:23:10,998 INFO L93 Difference]: Finished difference Result 9137 states and 12863 transitions. [2018-11-07 06:23:10,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 06:23:10,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 373 [2018-11-07 06:23:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:23:11,019 INFO L225 Difference]: With dead ends: 9137 [2018-11-07 06:23:11,019 INFO L226 Difference]: Without dead ends: 4478 [2018-11-07 06:23:11,039 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 380 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-11-07 06:23:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2018-11-07 06:23:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 4475. [2018-11-07 06:23:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4475 states. [2018-11-07 06:23:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 6294 transitions. [2018-11-07 06:23:11,163 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 6294 transitions. Word has length 373 [2018-11-07 06:23:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:23:11,163 INFO L480 AbstractCegarLoop]: Abstraction has 4475 states and 6294 transitions. [2018-11-07 06:23:11,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 06:23:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 6294 transitions. [2018-11-07 06:23:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2018-11-07 06:23:11,183 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:23:11,184 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:23:11,184 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:23:11,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:23:11,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1963815635, now seen corresponding path program 1 times [2018-11-07 06:23:11,185 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:23:11,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:23:11,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:23:11,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:23:11,186 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:23:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:23:11,556 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 06:23:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 232 proven. 332 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-11-07 06:23:11,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:23:11,842 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:23:11,842 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 454 with the following transitions: [2018-11-07 06:23:11,843 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [125], [127], [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], [599], [603], [607], [611], [614], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:23:11,847 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:23:11,847 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:23:16,833 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 06:23:16,834 INFO L272 AbstractInterpreter]: Visited 121 different actions 362 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 06:23:16,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:23:16,847 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 06:23:17,752 INFO L227 lantSequenceWeakener]: Weakened 450 states. On average, predicates are now at 80.15% of their original sizes. [2018-11-07 06:23:17,752 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 06:23:17,848 INFO L415 sIntCurrentIteration]: We unified 452 AI predicates to 452 [2018-11-07 06:23:17,848 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 06:23:17,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:23:17,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2018-11-07 06:23:17,849 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:23:17,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 06:23:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 06:23:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-07 06:23:17,850 INFO L87 Difference]: Start difference. First operand 4475 states and 6294 transitions. Second operand 9 states. [2018-11-07 06:23:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:23:45,541 INFO L93 Difference]: Finished difference Result 10192 states and 14714 transitions. [2018-11-07 06:23:45,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 06:23:45,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 453 [2018-11-07 06:23:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:23:45,565 INFO L225 Difference]: With dead ends: 10192 [2018-11-07 06:23:45,566 INFO L226 Difference]: Without dead ends: 6091 [2018-11-07 06:23:45,586 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 459 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-11-07 06:23:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2018-11-07 06:23:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 6060. [2018-11-07 06:23:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6060 states. [2018-11-07 06:23:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 8232 transitions. [2018-11-07 06:23:45,740 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 8232 transitions. Word has length 453 [2018-11-07 06:23:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:23:45,740 INFO L480 AbstractCegarLoop]: Abstraction has 6060 states and 8232 transitions. [2018-11-07 06:23:45,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 06:23:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 8232 transitions. [2018-11-07 06:23:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2018-11-07 06:23:45,771 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:23:45,771 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-11-07 06:23:45,771 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:23:45,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:23:45,772 INFO L82 PathProgramCache]: Analyzing trace with hash -271769872, now seen corresponding path program 1 times [2018-11-07 06:23:45,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:23:45,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:23:45,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:23:45,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:23:45,773 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:23:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:23:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 425 proven. 437 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-11-07 06:23:47,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:23:47,239 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:23:47,240 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 537 with the following transitions: [2018-11-07 06:23:47,240 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [125], [127], [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], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [614], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:23:47,244 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:23:47,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:23:57,307 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:23:57,308 INFO L272 AbstractInterpreter]: Visited 125 different actions 496 times. Merged at 9 different actions 32 times. Never widened. Found 8 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 06:23:57,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:23:57,314 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:23:57,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:23:57,314 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:23:57,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:23:57,326 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:23:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:23:57,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:23:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 486 proven. 2 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-11-07 06:23:58,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:23:58,629 WARN L179 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2018-11-07 06:23:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 486 proven. 2 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-11-07 06:23:59,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:23:59,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 21 [2018-11-07 06:23:59,586 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:23:59,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 06:23:59,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 06:23:59,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2018-11-07 06:23:59,595 INFO L87 Difference]: Start difference. First operand 6060 states and 8232 transitions. Second operand 18 states. [2018-11-07 06:24:11,415 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2018-11-07 06:24:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:24:13,755 INFO L93 Difference]: Finished difference Result 16438 states and 24880 transitions. [2018-11-07 06:24:13,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-07 06:24:13,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 536 [2018-11-07 06:24:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:24:13,812 INFO L225 Difference]: With dead ends: 16438 [2018-11-07 06:24:13,812 INFO L226 Difference]: Without dead ends: 9676 [2018-11-07 06:24:13,882 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1159 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=940, Invalid=3616, Unknown=0, NotChecked=0, Total=4556 [2018-11-07 06:24:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9676 states. [2018-11-07 06:24:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9676 to 8738. [2018-11-07 06:24:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8738 states. [2018-11-07 06:24:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8738 states to 8738 states and 10544 transitions. [2018-11-07 06:24:14,217 INFO L78 Accepts]: Start accepts. Automaton has 8738 states and 10544 transitions. Word has length 536 [2018-11-07 06:24:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:24:14,218 INFO L480 AbstractCegarLoop]: Abstraction has 8738 states and 10544 transitions. [2018-11-07 06:24:14,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 06:24:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 8738 states and 10544 transitions. [2018-11-07 06:24:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-11-07 06:24:14,232 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:24:14,233 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:24:14,233 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:24:14,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:24:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash 368524383, now seen corresponding path program 1 times [2018-11-07 06:24:14,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:24:14,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:24:14,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:24:14,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:24:14,235 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:24:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:24:14,743 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 06:24:15,724 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 06:24:16,021 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 06:24:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 332 proven. 621 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2018-11-07 06:24:17,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:24:17,135 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:24:17,135 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 664 with the following transitions: [2018-11-07 06:24:17,136 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [125], [127], [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], [599], [603], [607], [611], [614], [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], [750], [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] [2018-11-07 06:24:17,149 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:24:17,153 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:24:23,167 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:24:23,168 INFO L272 AbstractInterpreter]: Visited 192 different actions 768 times. Merged at 10 different actions 36 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 06:24:23,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:24:23,176 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:24:23,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:24:23,176 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:24:23,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:24:23,186 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:24:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:24:23,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:24:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 842 proven. 2 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2018-11-07 06:24:24,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:24:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 479 proven. 99 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2018-11-07 06:24:24,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:24:24,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2018-11-07 06:24:24,602 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:24:24,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 06:24:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 06:24:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-11-07 06:24:24,604 INFO L87 Difference]: Start difference. First operand 8738 states and 10544 transitions. Second operand 15 states. [2018-11-07 06:24:27,344 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2018-11-07 06:24:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:24:30,171 INFO L93 Difference]: Finished difference Result 19029 states and 23533 transitions. [2018-11-07 06:24:30,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-07 06:24:30,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 663 [2018-11-07 06:24:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:24:30,206 INFO L225 Difference]: With dead ends: 19029 [2018-11-07 06:24:30,206 INFO L226 Difference]: Without dead ends: 10153 [2018-11-07 06:24:30,233 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1397 GetRequests, 1348 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=516, Invalid=1934, Unknown=0, NotChecked=0, Total=2450 [2018-11-07 06:24:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10153 states. [2018-11-07 06:24:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10153 to 10033. [2018-11-07 06:24:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10033 states. [2018-11-07 06:24:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10033 states to 10033 states and 11239 transitions. [2018-11-07 06:24:30,438 INFO L78 Accepts]: Start accepts. Automaton has 10033 states and 11239 transitions. Word has length 663 [2018-11-07 06:24:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:24:30,439 INFO L480 AbstractCegarLoop]: Abstraction has 10033 states and 11239 transitions. [2018-11-07 06:24:30,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 06:24:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 10033 states and 11239 transitions. [2018-11-07 06:24:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-11-07 06:24:30,452 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:24:30,453 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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] [2018-11-07 06:24:30,453 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:24:30,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:24:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash 955759823, now seen corresponding path program 1 times [2018-11-07 06:24:30,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:24:30,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:24:30,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:24:30,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:24:30,455 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:24:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:24:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 652 proven. 99 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2018-11-07 06:24:31,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:24:31,557 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:24:31,558 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 808 with the following transitions: [2018-11-07 06:24:31,558 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [125], [127], [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], [599], [603], [607], [611], [614], [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] [2018-11-07 06:24:31,562 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:24:31,562 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:24:37,296 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:24:37,296 INFO L272 AbstractInterpreter]: Visited 193 different actions 772 times. Merged at 10 different actions 36 times. Widened at 1 different actions 1 times. Found 11 fixpoints after 6 different actions. Largest state had 24 variables. [2018-11-07 06:24:37,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:24:37,301 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:24:37,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:24:37,301 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:24:37,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:24:37,311 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:24:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:24:37,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:24:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 1110 proven. 2 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2018-11-07 06:24:38,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:24:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 652 proven. 99 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2018-11-07 06:24:38,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:24:38,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 06:24:38,908 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:24:38,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 06:24:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 06:24:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 06:24:38,909 INFO L87 Difference]: Start difference. First operand 10033 states and 11239 transitions. Second operand 7 states. [2018-11-07 06:24:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:24:40,684 INFO L93 Difference]: Finished difference Result 24057 states and 27362 transitions. [2018-11-07 06:24:40,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 06:24:40,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 807 [2018-11-07 06:24:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:24:40,731 INFO L225 Difference]: With dead ends: 24057 [2018-11-07 06:24:40,731 INFO L226 Difference]: Without dead ends: 14616 [2018-11-07 06:24:40,758 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1629 GetRequests, 1615 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 06:24:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14616 states. [2018-11-07 06:24:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14616 to 14139. [2018-11-07 06:24:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14139 states. [2018-11-07 06:24:41,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14139 states to 14139 states and 15855 transitions. [2018-11-07 06:24:41,022 INFO L78 Accepts]: Start accepts. Automaton has 14139 states and 15855 transitions. Word has length 807 [2018-11-07 06:24:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:24:41,023 INFO L480 AbstractCegarLoop]: Abstraction has 14139 states and 15855 transitions. [2018-11-07 06:24:41,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 06:24:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 14139 states and 15855 transitions. [2018-11-07 06:24:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2018-11-07 06:24:41,039 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:24:41,040 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 1] [2018-11-07 06:24:41,040 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:24:41,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:24:41,040 INFO L82 PathProgramCache]: Analyzing trace with hash -310219608, now seen corresponding path program 1 times [2018-11-07 06:24:41,040 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:24:41,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:24:41,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:24:41,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:24:41,042 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:24:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:24:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 502 proven. 150 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2018-11-07 06:24:42,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:24:42,209 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:24:42,209 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 885 with the following transitions: [2018-11-07 06:24:42,209 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [125], [127], [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], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [614], [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] [2018-11-07 06:24:42,212 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:24:42,213 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:24:47,970 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:24:47,970 INFO L272 AbstractInterpreter]: Visited 194 different actions 779 times. Merged at 11 different actions 39 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 6 different actions. Largest state had 24 variables. [2018-11-07 06:24:47,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:24:47,976 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:24:47,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:24:47,977 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 06:24:47,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:24:47,986 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:24:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:24:48,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:24:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 1471 proven. 2 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-07 06:24:48,610 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:24:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 502 proven. 150 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2018-11-07 06:24:49,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:24:49,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-11-07 06:24:49,294 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:24:49,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 06:24:49,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 06:24:49,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-07 06:24:49,296 INFO L87 Difference]: Start difference. First operand 14139 states and 15855 transitions. Second operand 10 states. [2018-11-07 06:24:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:24:52,714 INFO L93 Difference]: Finished difference Result 28560 states and 31941 transitions. [2018-11-07 06:24:52,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-07 06:24:52,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 884 [2018-11-07 06:24:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:24:52,759 INFO L225 Difference]: With dead ends: 28560 [2018-11-07 06:24:52,759 INFO L226 Difference]: Without dead ends: 14795 [2018-11-07 06:24:52,797 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1801 GetRequests, 1776 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2018-11-07 06:24:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14795 states. [2018-11-07 06:24:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14795 to 14250. [2018-11-07 06:24:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14250 states. [2018-11-07 06:24:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14250 states to 14250 states and 15249 transitions. [2018-11-07 06:24:53,049 INFO L78 Accepts]: Start accepts. Automaton has 14250 states and 15249 transitions. Word has length 884 [2018-11-07 06:24:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:24:53,051 INFO L480 AbstractCegarLoop]: Abstraction has 14250 states and 15249 transitions. [2018-11-07 06:24:53,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 06:24:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 14250 states and 15249 transitions. [2018-11-07 06:24:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 896 [2018-11-07 06:24:53,067 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:24:53,068 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:24:53,068 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:24:53,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:24:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1389640845, now seen corresponding path program 1 times [2018-11-07 06:24:53,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:24:53,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:24:53,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:24:53,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:24:53,070 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:24:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:24:54,054 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-11-07 06:24:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 534 proven. 1104 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2018-11-07 06:24:56,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:24:56,050 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:24:56,050 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 896 with the following transitions: [2018-11-07 06:24:56,050 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [125], [127], [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], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [614], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:24:56,054 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:24:56,054 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:25:01,935 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:25:01,935 INFO L272 AbstractInterpreter]: Visited 193 different actions 775 times. Merged at 11 different actions 39 times. Widened at 1 different actions 1 times. Found 11 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 06:25:01,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:25:01,951 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:25:01,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:25:01,951 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 06:25:01,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:25:01,964 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:25:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:25:02,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:25:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 1635 proven. 2 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-07 06:25:03,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-11-07 06:25:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 528 proven. 348 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-11-07 06:25:04,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:25:04,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 20 [2018-11-07 06:25:04,984 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:25:04,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 06:25:04,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 06:25:04,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2018-11-07 06:25:04,986 INFO L87 Difference]: Start difference. First operand 14250 states and 15249 transitions. Second operand 18 states. [2018-11-07 06:25:04,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-07 06:25:04,988 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 06:25:04,995 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 06:25:04,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:25:04 BoogieIcfgContainer [2018-11-07 06:25:04,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 06:25:04,996 INFO L168 Benchmark]: Toolchain (without parser) took 228898.07 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -80.1 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-11-07 06:25:04,997 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 06:25:04,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 812.95 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. [2018-11-07 06:25:04,999 INFO L168 Benchmark]: Boogie Procedure Inliner took 182.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -824.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2018-11-07 06:25:04,999 INFO L168 Benchmark]: Boogie Preprocessor took 116.06 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2018-11-07 06:25:05,000 INFO L168 Benchmark]: RCFGBuilder took 4004.48 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: 122.2 MB). Peak memory consumption was 122.2 MB. Max. memory is 7.1 GB. [2018-11-07 06:25:05,001 INFO L168 Benchmark]: TraceAbstraction took 223775.43 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.5 GB in the end (delta: 555.6 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-11-07 06:25:05,006 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 812.95 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 182.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -824.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.06 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4004.48 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: 122.2 MB). Peak memory consumption was 122.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 223775.43 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.5 GB in the end (delta: 555.6 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 67). Cancelled while BasicCegarLoop was constructing difference of abstraction (14250states) and FLOYD_HOARE automaton (currently 2 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 223.6s OverallTime, 12 OverallIterations, 8 TraceHistogramMax, 142.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1699 SDtfs, 18082 SDslu, 2556 SDs, 0 SdLazy, 23028 SolverSat, 3995 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 106.5s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 9221 GetRequests, 8990 SyntacticMatches, 7 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14250occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 47.3s AbstIntTime, 9 AbstIntIterations, 4 AbstIntStrong, 0.9971759086519069 AbsIntWeakeningRatio, 0.09215262778977681 AbsIntAvgWeakeningVarsNumRemoved, 16.03959683225342 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 2118 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 17.1s InterpolantComputationTime, 9347 NumberOfCodeBlocks, 9347 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 13110 ConstructedInterpolants, 0 QuantifiedInterpolants, 41323073 SizeOfPredicates, 25 NumberOfNonLiveVariables, 5464 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 22 InterpolantComputations, 3 PerfectInterpolantSequences, 23790/27422 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown