java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label34_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:30:08,211 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:30:08,213 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:30:08,225 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:30:08,225 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:30:08,226 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:30:08,228 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:30:08,230 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:30:08,232 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:30:08,232 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:30:08,233 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:30:08,234 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:30:08,235 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:30:08,236 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:30:08,237 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:30:08,238 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:30:08,239 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:30:08,241 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:30:08,243 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:30:08,244 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:30:08,246 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:30:08,247 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:30:08,253 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:30:08,253 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:30:08,253 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:30:08,256 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:30:08,258 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:30:08,258 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:30:08,262 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:30:08,263 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:30:08,263 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:30:08,264 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:30:08,266 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:30:08,266 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:30:08,267 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:30:08,268 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:30:08,268 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 16:30:08,300 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:30:08,300 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:30:08,301 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:30:08,302 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:30:08,302 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:30:08,303 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:30:08,303 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:30:08,303 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:30:08,303 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:30:08,303 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:30:08,304 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:30:08,304 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:30:08,304 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:30:08,305 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:30:08,306 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:30:08,306 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:30:08,306 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:30:08,306 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:30:08,306 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:30:08,308 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:30:08,308 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:30:08,308 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:30:08,308 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:30:08,308 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:30:08,309 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:30:08,309 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:30:08,309 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:30:08,309 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:30:08,309 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:30:08,309 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:30:08,310 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:30:08,310 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:30:08,310 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:30:08,311 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:30:08,311 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:30:08,358 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:30:08,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:30:08,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:30:08,380 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:30:08,380 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:30:08,381 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label34_false-unreach-call_false-termination.c [2018-11-12 16:30:08,453 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd9549002/2e4442004eec4d8aaeeeb37978891040/FLAG8136672b4 [2018-11-12 16:30:09,048 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:30:09,051 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label34_false-unreach-call_false-termination.c [2018-11-12 16:30:09,074 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd9549002/2e4442004eec4d8aaeeeb37978891040/FLAG8136672b4 [2018-11-12 16:30:09,094 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd9549002/2e4442004eec4d8aaeeeb37978891040 [2018-11-12 16:30:09,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:30:09,110 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:30:09,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:30:09,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:30:09,114 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:30:09,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:09,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4111f80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09, skipping insertion in model container [2018-11-12 16:30:09,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:09,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:30:09,187 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:30:09,752 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:30:09,757 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:30:09,892 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:30:09,910 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:30:09,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09 WrapperNode [2018-11-12 16:30:09,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:30:09,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:30:09,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:30:09,913 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:30:09,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:10,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:10,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:30:10,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:30:10,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:30:10,063 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:30:10,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:10,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:10,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:10,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:10,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:10,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:10,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... [2018-11-12 16:30:10,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:30:10,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:30:10,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:30:10,174 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:30:10,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:30:10,280 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:30:10,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:30:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:30:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:30:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:30:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:30:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:30:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:30:10,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:30:13,734 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:30:13,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:30:13 BoogieIcfgContainer [2018-11-12 16:30:13,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:30:13,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:30:13,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:30:13,739 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:30:13,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:30:09" (1/3) ... [2018-11-12 16:30:13,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b36233d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:30:13, skipping insertion in model container [2018-11-12 16:30:13,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:09" (2/3) ... [2018-11-12 16:30:13,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b36233d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:30:13, skipping insertion in model container [2018-11-12 16:30:13,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:30:13" (3/3) ... [2018-11-12 16:30:13,743 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label34_false-unreach-call_false-termination.c [2018-11-12 16:30:13,754 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:30:13,761 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:30:13,775 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:30:13,813 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:30:13,814 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:30:13,814 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:30:13,814 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:30:13,814 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:30:13,815 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:30:13,815 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:30:13,815 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:30:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 16:30:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-12 16:30:13,852 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:13,853 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:13,856 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:13,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:13,862 INFO L82 PathProgramCache]: Analyzing trace with hash 457799444, now seen corresponding path program 1 times [2018-11-12 16:30:13,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:13,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:13,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:13,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:13,915 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:30:14,266 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:30:14,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:30:14,266 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:14,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:30:14,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:30:14,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:30:14,295 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-12 16:30:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:17,271 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-11-12 16:30:17,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:30:17,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2018-11-12 16:30:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:17,296 INFO L225 Difference]: With dead ends: 894 [2018-11-12 16:30:17,297 INFO L226 Difference]: Without dead ends: 633 [2018-11-12 16:30:17,306 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:30:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-11-12 16:30:17,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-11-12 16:30:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-11-12 16:30:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1007 transitions. [2018-11-12 16:30:17,405 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1007 transitions. Word has length 34 [2018-11-12 16:30:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:17,406 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1007 transitions. [2018-11-12 16:30:17,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:30:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1007 transitions. [2018-11-12 16:30:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-12 16:30:17,415 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:17,416 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:17,416 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:17,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash 610303147, now seen corresponding path program 1 times [2018-11-12 16:30:17,417 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:17,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:17,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:17,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:17,419 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:30:17,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:30:17,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:30:17,702 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:17,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:30:17,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:30:17,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:30:17,705 INFO L87 Difference]: Start difference. First operand 633 states and 1007 transitions. Second operand 4 states. [2018-11-12 16:30:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:21,127 INFO L93 Difference]: Finished difference Result 2170 states and 3670 transitions. [2018-11-12 16:30:21,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:30:21,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2018-11-12 16:30:21,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:21,145 INFO L225 Difference]: With dead ends: 2170 [2018-11-12 16:30:21,146 INFO L226 Difference]: Without dead ends: 1543 [2018-11-12 16:30:21,152 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:30:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2018-11-12 16:30:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1543. [2018-11-12 16:30:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2018-11-12 16:30:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2368 transitions. [2018-11-12 16:30:21,248 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2368 transitions. Word has length 147 [2018-11-12 16:30:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:21,251 INFO L480 AbstractCegarLoop]: Abstraction has 1543 states and 2368 transitions. [2018-11-12 16:30:21,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:30:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2368 transitions. [2018-11-12 16:30:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-12 16:30:21,269 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:21,270 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:21,270 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:21,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:21,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1882907655, now seen corresponding path program 1 times [2018-11-12 16:30:21,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:21,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:21,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:21,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:21,272 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:30:22,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:22,017 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:22,018 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 262 with the following transitions: [2018-11-12 16:30:22,021 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [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], [786], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:22,093 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:22,094 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:22,931 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:30:22,934 INFO L272 AbstractInterpreter]: Visited 148 different actions 148 times. Never merged. Never widened. Performed 1352 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1352 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 16:30:22,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:22,977 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:30:23,659 INFO L227 lantSequenceWeakener]: Weakened 252 states. On average, predicates are now at 77.55% of their original sizes. [2018-11-12 16:30:23,659 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:30:24,004 INFO L415 sIntCurrentIteration]: We unified 260 AI predicates to 260 [2018-11-12 16:30:24,007 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:30:24,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:30:24,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-12 16:30:24,009 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:24,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:30:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:30:24,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:30:24,011 INFO L87 Difference]: Start difference. First operand 1543 states and 2368 transitions. Second operand 7 states. [2018-11-12 16:30:26,225 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:40,576 INFO L93 Difference]: Finished difference Result 3265 states and 4970 transitions. [2018-11-12 16:30:40,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:30:40,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 261 [2018-11-12 16:30:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:40,587 INFO L225 Difference]: With dead ends: 3265 [2018-11-12 16:30:40,587 INFO L226 Difference]: Without dead ends: 1728 [2018-11-12 16:30:40,592 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:30:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2018-11-12 16:30:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1726. [2018-11-12 16:30:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-11-12 16:30:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2558 transitions. [2018-11-12 16:30:40,644 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2558 transitions. Word has length 261 [2018-11-12 16:30:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:40,644 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 2558 transitions. [2018-11-12 16:30:40,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:30:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2558 transitions. [2018-11-12 16:30:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-11-12 16:30:40,655 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:40,656 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:40,657 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:40,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1291032168, now seen corresponding path program 1 times [2018-11-12 16:30:40,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:40,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:40,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:40,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:40,659 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:41,241 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:30:41,450 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:30:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 168 proven. 161 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:30:42,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:42,121 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:42,121 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 347 with the following transitions: [2018-11-12 16:30:42,122 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [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], [786], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:42,128 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:42,128 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:42,790 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:30:42,790 INFO L272 AbstractInterpreter]: Visited 152 different actions 297 times. Merged at 4 different actions 4 times. Never widened. Performed 4095 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4095 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:30:42,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:42,830 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:30:43,977 INFO L227 lantSequenceWeakener]: Weakened 127 states. On average, predicates are now at 78.15% of their original sizes. [2018-11-12 16:30:43,977 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:30:46,661 INFO L415 sIntCurrentIteration]: We unified 345 AI predicates to 345 [2018-11-12 16:30:46,661 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:30:46,661 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:30:46,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [12] total 34 [2018-11-12 16:30:46,662 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:46,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-12 16:30:46,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-12 16:30:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2018-11-12 16:30:46,664 INFO L87 Difference]: Start difference. First operand 1726 states and 2558 transitions. Second operand 24 states. [2018-11-12 16:30:58,929 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:19,341 INFO L93 Difference]: Finished difference Result 3979 states and 5850 transitions. [2018-11-12 16:31:19,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 16:31:19,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 346 [2018-11-12 16:31:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:19,354 INFO L225 Difference]: With dead ends: 3979 [2018-11-12 16:31:19,355 INFO L226 Difference]: Without dead ends: 2442 [2018-11-12 16:31:19,361 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 361 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2018-11-12 16:31:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2018-11-12 16:31:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2434. [2018-11-12 16:31:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2018-11-12 16:31:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3300 transitions. [2018-11-12 16:31:19,430 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3300 transitions. Word has length 346 [2018-11-12 16:31:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:19,431 INFO L480 AbstractCegarLoop]: Abstraction has 2434 states and 3300 transitions. [2018-11-12 16:31:19,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-12 16:31:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3300 transitions. [2018-11-12 16:31:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-11-12 16:31:19,441 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:19,442 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:31:19,442 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:19,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash -883607892, now seen corresponding path program 1 times [2018-11-12 16:31:19,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:19,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:19,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:19,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:19,444 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:19,764 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-12 16:31:20,061 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-11-12 16:31:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 140 proven. 166 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-11-12 16:31:20,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:20,818 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:20,818 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 373 with the following transitions: [2018-11-12 16:31:20,818 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [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], [786], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:20,823 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:20,823 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:21,103 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:21,104 INFO L272 AbstractInterpreter]: Visited 152 different actions 298 times. Merged at 5 different actions 5 times. Never widened. Performed 2998 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2998 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:31:21,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:21,141 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:21,692 INFO L227 lantSequenceWeakener]: Weakened 122 states. On average, predicates are now at 78.27% of their original sizes. [2018-11-12 16:31:21,692 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:31:22,510 INFO L415 sIntCurrentIteration]: We unified 371 AI predicates to 371 [2018-11-12 16:31:22,510 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:31:22,510 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:31:22,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [8] total 28 [2018-11-12 16:31:22,511 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:22,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 16:31:22,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 16:31:22,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2018-11-12 16:31:22,513 INFO L87 Difference]: Start difference. First operand 2434 states and 3300 transitions. Second operand 22 states. [2018-11-12 16:31:31,179 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:42,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:42,010 INFO L93 Difference]: Finished difference Result 4344 states and 6147 transitions. [2018-11-12 16:31:42,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-12 16:31:42,010 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 372 [2018-11-12 16:31:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:42,024 INFO L225 Difference]: With dead ends: 4344 [2018-11-12 16:31:42,024 INFO L226 Difference]: Without dead ends: 2807 [2018-11-12 16:31:42,031 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 391 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2018-11-12 16:31:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2018-11-12 16:31:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2802. [2018-11-12 16:31:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2802 states. [2018-11-12 16:31:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 3696 transitions. [2018-11-12 16:31:42,102 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 3696 transitions. Word has length 372 [2018-11-12 16:31:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:42,103 INFO L480 AbstractCegarLoop]: Abstraction has 2802 states and 3696 transitions. [2018-11-12 16:31:42,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 16:31:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 3696 transitions. [2018-11-12 16:31:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-11-12 16:31:42,114 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:42,115 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:31:42,115 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:42,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:42,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2048489408, now seen corresponding path program 1 times [2018-11-12 16:31:42,116 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:42,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:42,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:42,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:42,117 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:42,468 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 16:31:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 219 proven. 124 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-12 16:31:43,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:43,542 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:43,542 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 399 with the following transitions: [2018-11-12 16:31:43,543 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [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], [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], [786], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:43,553 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:43,554 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:43,751 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:43,938 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:43,938 INFO L272 AbstractInterpreter]: Visited 152 different actions 449 times. Merged at 7 different actions 15 times. Never widened. Performed 4880 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4880 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:31:43,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:43,944 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:44,399 INFO L227 lantSequenceWeakener]: Weakened 395 states. On average, predicates are now at 80.11% of their original sizes. [2018-11-12 16:31:44,399 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:31:44,493 INFO L415 sIntCurrentIteration]: We unified 397 AI predicates to 397 [2018-11-12 16:31:44,494 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:31:44,494 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:31:44,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 16:31:44,494 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:44,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:31:44,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:31:44,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:31:44,496 INFO L87 Difference]: Start difference. First operand 2802 states and 3696 transitions. Second operand 10 states. [2018-11-12 16:31:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:48,496 INFO L93 Difference]: Finished difference Result 4915 states and 7009 transitions. [2018-11-12 16:31:48,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:31:48,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 398 [2018-11-12 16:31:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:48,512 INFO L225 Difference]: With dead ends: 4915 [2018-11-12 16:31:48,513 INFO L226 Difference]: Without dead ends: 3378 [2018-11-12 16:31:48,520 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 405 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:31:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3378 states. [2018-11-12 16:31:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3378 to 3361. [2018-11-12 16:31:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3361 states. [2018-11-12 16:31:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 4412 transitions. [2018-11-12 16:31:48,599 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 4412 transitions. Word has length 398 [2018-11-12 16:31:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:48,600 INFO L480 AbstractCegarLoop]: Abstraction has 3361 states and 4412 transitions. [2018-11-12 16:31:48,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:31:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 4412 transitions. [2018-11-12 16:31:48,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2018-11-12 16:31:48,616 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:48,616 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:31:48,617 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:48,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:48,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2072426477, now seen corresponding path program 1 times [2018-11-12 16:31:48,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:48,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:48,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:48,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:48,619 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 201 proven. 165 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-11-12 16:31:49,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:49,802 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:49,802 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 458 with the following transitions: [2018-11-12 16:31:49,802 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [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], [786], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:49,805 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:49,805 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:50,422 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:50,422 INFO L272 AbstractInterpreter]: Visited 153 different actions 457 times. Merged at 7 different actions 20 times. Never widened. Performed 5982 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5982 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:31:50,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:50,462 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:50,992 INFO L227 lantSequenceWeakener]: Weakened 187 states. On average, predicates are now at 77.87% of their original sizes. [2018-11-12 16:31:50,992 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:31:51,441 INFO L415 sIntCurrentIteration]: We unified 456 AI predicates to 456 [2018-11-12 16:31:51,441 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:31:51,441 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:31:51,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [6] total 27 [2018-11-12 16:31:51,441 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:51,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-12 16:31:51,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-12 16:31:51,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2018-11-12 16:31:51,443 INFO L87 Difference]: Start difference. First operand 3361 states and 4412 transitions. Second operand 23 states. [2018-11-12 16:32:00,121 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:13,719 INFO L93 Difference]: Finished difference Result 7227 states and 9615 transitions. [2018-11-12 16:32:13,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-12 16:32:13,719 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 457 [2018-11-12 16:32:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:13,738 INFO L225 Difference]: With dead ends: 7227 [2018-11-12 16:32:13,738 INFO L226 Difference]: Without dead ends: 5131 [2018-11-12 16:32:13,747 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 478 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2018-11-12 16:32:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2018-11-12 16:32:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 4006. [2018-11-12 16:32:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4006 states. [2018-11-12 16:32:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 5120 transitions. [2018-11-12 16:32:13,857 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 5120 transitions. Word has length 457 [2018-11-12 16:32:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:13,858 INFO L480 AbstractCegarLoop]: Abstraction has 4006 states and 5120 transitions. [2018-11-12 16:32:13,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-12 16:32:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 5120 transitions. [2018-11-12 16:32:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-11-12 16:32:13,874 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:13,875 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:13,875 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:13,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:13,875 INFO L82 PathProgramCache]: Analyzing trace with hash 658954511, now seen corresponding path program 1 times [2018-11-12 16:32:13,876 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:13,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:13,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:13,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:13,877 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-12 16:32:14,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:14,962 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:14,962 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 484 with the following transitions: [2018-11-12 16:32:14,962 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [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], [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], [786], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:14,967 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:14,967 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:15,345 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:15,583 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:15,584 INFO L272 AbstractInterpreter]: Visited 154 different actions 610 times. Merged at 8 different actions 30 times. Never widened. Performed 8654 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8654 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 7 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:32:15,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:15,591 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:15,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:15,591 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:32:15,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:15,601 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:15,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-12 16:32:16,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-12 16:32:17,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:17,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 16:32:17,072 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:17,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:32:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:32:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-12 16:32:17,076 INFO L87 Difference]: Start difference. First operand 4006 states and 5120 transitions. Second operand 9 states. [2018-11-12 16:32:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:20,109 INFO L93 Difference]: Finished difference Result 8679 states and 12247 transitions. [2018-11-12 16:32:20,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 16:32:20,109 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 483 [2018-11-12 16:32:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:20,135 INFO L225 Difference]: With dead ends: 8679 [2018-11-12 16:32:20,135 INFO L226 Difference]: Without dead ends: 3969 [2018-11-12 16:32:20,159 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 967 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-11-12 16:32:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2018-11-12 16:32:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 3874. [2018-11-12 16:32:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3874 states. [2018-11-12 16:32:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3874 states to 3874 states and 5414 transitions. [2018-11-12 16:32:20,285 INFO L78 Accepts]: Start accepts. Automaton has 3874 states and 5414 transitions. Word has length 483 [2018-11-12 16:32:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:20,286 INFO L480 AbstractCegarLoop]: Abstraction has 3874 states and 5414 transitions. [2018-11-12 16:32:20,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:32:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3874 states and 5414 transitions. [2018-11-12 16:32:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2018-11-12 16:32:20,303 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:20,304 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:20,304 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:20,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash 411978100, now seen corresponding path program 1 times [2018-11-12 16:32:20,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:20,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:20,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:20,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:20,306 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 296 proven. 136 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2018-11-12 16:32:21,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:21,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:21,242 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 553 with the following transitions: [2018-11-12 16:32:21,243 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [494], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [786], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:21,245 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:21,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:21,396 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:21,778 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:21,778 INFO L272 AbstractInterpreter]: Visited 155 different actions 612 times. Merged at 8 different actions 28 times. Never widened. Performed 7311 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7311 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:32:21,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:21,787 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:21,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:21,787 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:32:21,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:21,796 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:21,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 749 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-11-12 16:32:22,189 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 296 proven. 136 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2018-11-12 16:32:22,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:22,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-12 16:32:22,580 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:22,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:32:22,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:32:22,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:32:22,582 INFO L87 Difference]: Start difference. First operand 3874 states and 5414 transitions. Second operand 10 states. [2018-11-12 16:32:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:27,801 INFO L93 Difference]: Finished difference Result 15247 states and 25737 transitions. [2018-11-12 16:32:27,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-12 16:32:27,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 552 [2018-11-12 16:32:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:27,880 INFO L225 Difference]: With dead ends: 15247 [2018-11-12 16:32:27,880 INFO L226 Difference]: Without dead ends: 11361 [2018-11-12 16:32:27,943 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1116 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2018-11-12 16:32:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11361 states. [2018-11-12 16:32:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11361 to 11262. [2018-11-12 16:32:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11262 states. [2018-11-12 16:32:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11262 states to 11262 states and 16792 transitions. [2018-11-12 16:32:28,314 INFO L78 Accepts]: Start accepts. Automaton has 11262 states and 16792 transitions. Word has length 552 [2018-11-12 16:32:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:28,315 INFO L480 AbstractCegarLoop]: Abstraction has 11262 states and 16792 transitions. [2018-11-12 16:32:28,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:32:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 11262 states and 16792 transitions. [2018-11-12 16:32:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-11-12 16:32:28,348 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:28,348 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:28,348 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:28,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:28,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1533793041, now seen corresponding path program 1 times [2018-11-12 16:32:28,349 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:28,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:28,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:28,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:28,350 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 427 proven. 403 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-11-12 16:32:29,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:29,441 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:29,442 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 556 with the following transitions: [2018-11-12 16:32:29,442 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [786], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:29,444 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:29,444 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:29,607 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:29,982 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:29,983 INFO L272 AbstractInterpreter]: Visited 155 different actions 615 times. Merged at 8 different actions 31 times. Never widened. Performed 7327 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7327 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:32:29,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:29,990 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:29,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:29,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:32:30,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:30,001 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:30,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 520 proven. 2 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2018-11-12 16:32:30,456 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 520 proven. 2 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2018-11-12 16:32:30,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:30,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:32:30,757 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:30,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:32:30,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:32:30,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:32:30,759 INFO L87 Difference]: Start difference. First operand 11262 states and 16792 transitions. Second operand 17 states. [2018-11-12 16:32:38,585 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-11-12 16:32:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:40,649 INFO L93 Difference]: Finished difference Result 24531 states and 45538 transitions. [2018-11-12 16:32:40,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-12 16:32:40,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 555 [2018-11-12 16:32:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:40,737 INFO L225 Difference]: With dead ends: 24531 [2018-11-12 16:32:40,737 INFO L226 Difference]: Without dead ends: 8786 [2018-11-12 16:32:40,951 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 1131 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1174, Invalid=4526, Unknown=0, NotChecked=0, Total=5700 [2018-11-12 16:32:40,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8786 states. [2018-11-12 16:32:41,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8786 to 7211. [2018-11-12 16:32:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7211 states. [2018-11-12 16:32:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 8652 transitions. [2018-11-12 16:32:41,467 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 8652 transitions. Word has length 555 [2018-11-12 16:32:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:41,469 INFO L480 AbstractCegarLoop]: Abstraction has 7211 states and 8652 transitions. [2018-11-12 16:32:41,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:32:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 8652 transitions. [2018-11-12 16:32:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-11-12 16:32:41,481 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:41,482 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:41,482 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:41,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash 576152716, now seen corresponding path program 1 times [2018-11-12 16:32:41,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:41,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:41,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:41,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:41,484 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:41,889 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 16:32:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 315 proven. 240 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-11-12 16:32:42,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:42,307 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:42,307 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 573 with the following transitions: [2018-11-12 16:32:42,308 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [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], [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], [786], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [910], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:42,310 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:42,310 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:42,500 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:43,001 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:32:43,001 INFO L272 AbstractInterpreter]: Visited 184 different actions 730 times. Merged at 8 different actions 27 times. Never widened. Performed 9137 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9137 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:32:43,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:43,009 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:32:43,771 INFO L227 lantSequenceWeakener]: Weakened 130 states. On average, predicates are now at 79.92% of their original sizes. [2018-11-12 16:32:43,771 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:32:44,166 INFO L415 sIntCurrentIteration]: We unified 571 AI predicates to 571 [2018-11-12 16:32:44,166 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:32:44,167 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:32:44,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [7] total 25 [2018-11-12 16:32:44,167 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:44,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 16:32:44,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 16:32:44,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:32:44,168 INFO L87 Difference]: Start difference. First operand 7211 states and 8652 transitions. Second operand 20 states. [2018-11-12 16:33:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:01,129 INFO L93 Difference]: Finished difference Result 15808 states and 19308 transitions. [2018-11-12 16:33:01,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-12 16:33:01,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 572 [2018-11-12 16:33:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:01,157 INFO L225 Difference]: With dead ends: 15808 [2018-11-12 16:33:01,157 INFO L226 Difference]: Without dead ends: 9158 [2018-11-12 16:33:01,175 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 585 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2018-11-12 16:33:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9158 states. [2018-11-12 16:33:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9158 to 8423. [2018-11-12 16:33:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8423 states. [2018-11-12 16:33:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8423 states to 8423 states and 9862 transitions. [2018-11-12 16:33:01,364 INFO L78 Accepts]: Start accepts. Automaton has 8423 states and 9862 transitions. Word has length 572 [2018-11-12 16:33:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:01,365 INFO L480 AbstractCegarLoop]: Abstraction has 8423 states and 9862 transitions. [2018-11-12 16:33:01,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 16:33:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8423 states and 9862 transitions. [2018-11-12 16:33:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2018-11-12 16:33:01,381 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:01,382 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, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:01,382 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:01,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:01,383 INFO L82 PathProgramCache]: Analyzing trace with hash 965208195, now seen corresponding path program 1 times [2018-11-12 16:33:01,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:01,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:01,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:01,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:01,384 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-11-12 16:33:02,160 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:33:02,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:33:02,161 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:02,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:33:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:33:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:33:02,162 INFO L87 Difference]: Start difference. First operand 8423 states and 9862 transitions. Second operand 4 states. [2018-11-12 16:33:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:04,167 INFO L93 Difference]: Finished difference Result 15532 states and 18489 transitions. [2018-11-12 16:33:04,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:33:04,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 741 [2018-11-12 16:33:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:04,193 INFO L225 Difference]: With dead ends: 15532 [2018-11-12 16:33:04,193 INFO L226 Difference]: Without dead ends: 8016 [2018-11-12 16:33:04,215 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 [2018-11-12 16:33:04,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2018-11-12 16:33:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8012. [2018-11-12 16:33:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8012 states. [2018-11-12 16:33:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8012 states to 8012 states and 9105 transitions. [2018-11-12 16:33:04,385 INFO L78 Accepts]: Start accepts. Automaton has 8012 states and 9105 transitions. Word has length 741 [2018-11-12 16:33:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:04,386 INFO L480 AbstractCegarLoop]: Abstraction has 8012 states and 9105 transitions. [2018-11-12 16:33:04,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:33:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 8012 states and 9105 transitions. [2018-11-12 16:33:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2018-11-12 16:33:04,402 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:04,403 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, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:04,403 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:04,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:04,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1421884539, now seen corresponding path program 1 times [2018-11-12 16:33:04,404 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:04,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:04,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:04,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:04,405 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 492 proven. 704 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-11-12 16:33:06,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:06,429 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:06,429 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 778 with the following transitions: [2018-11-12 16:33:06,430 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [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], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [930], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:06,432 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:06,432 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:06,587 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:07,278 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:07,278 INFO L272 AbstractInterpreter]: Visited 192 different actions 966 times. Merged at 10 different actions 54 times. Widened at 1 different actions 2 times. Performed 11519 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11519 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:33:07,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:07,286 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:07,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:07,286 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:33:07,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:07,296 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:07,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 1058 proven. 2 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2018-11-12 16:33:08,330 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:33:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 538 proven. 178 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2018-11-12 16:33:09,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:09,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-12 16:33:09,207 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:09,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:33:09,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:33:09,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:33:09,210 INFO L87 Difference]: Start difference. First operand 8012 states and 9105 transitions. Second operand 17 states. [2018-11-12 16:33:12,138 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2018-11-12 16:33:12,339 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2018-11-12 16:33:12,671 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-12 16:33:13,232 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-12 16:33:15,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:15,992 INFO L93 Difference]: Finished difference Result 19163 states and 22314 transitions. [2018-11-12 16:33:15,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-12 16:33:15,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 777 [2018-11-12 16:33:15,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:16,020 INFO L225 Difference]: With dead ends: 19163 [2018-11-12 16:33:16,020 INFO L226 Difference]: Without dead ends: 11344 [2018-11-12 16:33:16,042 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1620 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2018-11-12 16:33:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11344 states. [2018-11-12 16:33:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11344 to 10907. [2018-11-12 16:33:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10907 states. [2018-11-12 16:33:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10907 states to 10907 states and 12493 transitions. [2018-11-12 16:33:16,413 INFO L78 Accepts]: Start accepts. Automaton has 10907 states and 12493 transitions. Word has length 777 [2018-11-12 16:33:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:16,414 INFO L480 AbstractCegarLoop]: Abstraction has 10907 states and 12493 transitions. [2018-11-12 16:33:16,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:33:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 10907 states and 12493 transitions. [2018-11-12 16:33:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2018-11-12 16:33:16,439 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:16,440 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:16,440 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:16,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash 275685651, now seen corresponding path program 1 times [2018-11-12 16:33:16,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:16,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:16,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:16,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:16,442 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1735 backedges. 427 proven. 150 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2018-11-12 16:33:17,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:17,083 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:17,083 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 810 with the following transitions: [2018-11-12 16:33:17,083 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [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], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [930], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:17,086 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:17,086 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:17,266 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:17,993 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:17,993 INFO L272 AbstractInterpreter]: Visited 193 different actions 983 times. Merged at 11 different actions 66 times. Widened at 1 different actions 1 times. Performed 11554 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11554 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 16 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:33:17,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:17,999 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:17,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:17,999 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:33:18,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:18,008 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:18,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1735 backedges. 1173 proven. 2 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2018-11-12 16:33:18,701 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:33:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1735 backedges. 427 proven. 150 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2018-11-12 16:33:19,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:19,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-11-12 16:33:19,104 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:19,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:33:19,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:33:19,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:33:19,106 INFO L87 Difference]: Start difference. First operand 10907 states and 12493 transitions. Second operand 7 states. [2018-11-12 16:33:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:20,687 INFO L93 Difference]: Finished difference Result 24314 states and 28700 transitions. [2018-11-12 16:33:20,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 16:33:20,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 809 [2018-11-12 16:33:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:20,724 INFO L225 Difference]: With dead ends: 24314 [2018-11-12 16:33:20,724 INFO L226 Difference]: Without dead ends: 13968 [2018-11-12 16:33:20,750 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1631 GetRequests, 1619 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:33:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13968 states. [2018-11-12 16:33:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13968 to 13569. [2018-11-12 16:33:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13569 states. [2018-11-12 16:33:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13569 states to 13569 states and 15538 transitions. [2018-11-12 16:33:21,027 INFO L78 Accepts]: Start accepts. Automaton has 13569 states and 15538 transitions. Word has length 809 [2018-11-12 16:33:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:21,028 INFO L480 AbstractCegarLoop]: Abstraction has 13569 states and 15538 transitions. [2018-11-12 16:33:21,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:33:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 13569 states and 15538 transitions. [2018-11-12 16:33:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2018-11-12 16:33:21,059 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:21,060 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:21,060 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:21,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2036286680, now seen corresponding path program 1 times [2018-11-12 16:33:21,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:21,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:21,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:21,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:21,062 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:22,127 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-11-12 16:33:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 576 proven. 1203 refuted. 0 times theorem prover too weak. 734 trivial. 0 not checked. [2018-11-12 16:33:24,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:24,253 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:24,253 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 981 with the following transitions: [2018-11-12 16:33:24,253 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [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], [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], [930], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:24,256 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:24,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:24,585 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:25,600 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:25,600 INFO L272 AbstractInterpreter]: Visited 193 different actions 1167 times. Merged at 11 different actions 69 times. Widened at 1 different actions 3 times. Performed 13916 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13916 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 20 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-12 16:33:25,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:25,618 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:25,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:25,618 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:33:25,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:25,627 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:25,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:26,801 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-12 16:33:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 968 proven. 2 refuted. 0 times theorem prover too weak. 1543 trivial. 0 not checked. [2018-11-12 16:33:27,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:33:27,728 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2018-11-12 16:33:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 968 proven. 2 refuted. 0 times theorem prover too weak. 1543 trivial. 0 not checked. [2018-11-12 16:33:28,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:28,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 19 [2018-11-12 16:33:28,673 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:28,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:33:28,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:33:28,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:33:28,675 INFO L87 Difference]: Start difference. First operand 13569 states and 15538 transitions. Second operand 18 states. [2018-11-12 16:33:30,607 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2018-11-12 16:33:30,827 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2018-11-12 16:33:32,965 WARN L179 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2018-11-12 16:33:33,319 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2018-11-12 16:33:35,884 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-11-12 16:33:36,770 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-12 16:33:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:37,249 INFO L93 Difference]: Finished difference Result 26402 states and 30596 transitions. [2018-11-12 16:33:37,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-12 16:33:37,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 980 [2018-11-12 16:33:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:37,283 INFO L225 Difference]: With dead ends: 26402 [2018-11-12 16:33:37,283 INFO L226 Difference]: Without dead ends: 14104 [2018-11-12 16:33:37,314 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2044 GetRequests, 1986 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=715, Invalid=2825, Unknown=0, NotChecked=0, Total=3540 [2018-11-12 16:33:37,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14104 states. [2018-11-12 16:33:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14104 to 13761. [2018-11-12 16:33:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13761 states. [2018-11-12 16:33:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13761 states to 13761 states and 15283 transitions. [2018-11-12 16:33:37,605 INFO L78 Accepts]: Start accepts. Automaton has 13761 states and 15283 transitions. Word has length 980 [2018-11-12 16:33:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:37,606 INFO L480 AbstractCegarLoop]: Abstraction has 13761 states and 15283 transitions. [2018-11-12 16:33:37,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:33:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 13761 states and 15283 transitions. [2018-11-12 16:33:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1113 [2018-11-12 16:33:37,633 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:37,633 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:37,634 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:37,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:37,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1085188256, now seen corresponding path program 1 times [2018-11-12 16:33:37,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:37,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:37,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:37,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:37,636 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3253 backedges. 1130 proven. 2 refuted. 0 times theorem prover too weak. 2121 trivial. 0 not checked. [2018-11-12 16:33:38,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:38,862 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:38,862 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1113 with the following transitions: [2018-11-12 16:33:38,862 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [930], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:38,865 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:38,865 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:39,078 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:40,041 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:40,042 INFO L272 AbstractInterpreter]: Visited 195 different actions 991 times. Merged at 13 different actions 64 times. Widened at 1 different actions 1 times. Performed 12980 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12980 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 21 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:33:40,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:40,078 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:40,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:40,078 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:33:40,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:40,093 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:40,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3253 backedges. 1130 proven. 2 refuted. 0 times theorem prover too weak. 2121 trivial. 0 not checked. [2018-11-12 16:33:41,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-11-12 16:33:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3253 backedges. 1130 proven. 2 refuted. 0 times theorem prover too weak. 2121 trivial. 0 not checked. [2018-11-12 16:33:41,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:41,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:33:41,917 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:41,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:33:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:33:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:33:41,919 INFO L87 Difference]: Start difference. First operand 13761 states and 15283 transitions. Second operand 7 states. [2018-11-12 16:33:41,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-12 16:33:41,920 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:33:41,925 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:33:41,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:33:41 BoogieIcfgContainer [2018-11-12 16:33:41,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:33:41,926 INFO L168 Benchmark]: Toolchain (without parser) took 212818.46 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -837.5 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-11-12 16:33:41,927 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:33:41,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 801.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-12 16:33:41,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 150.19 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 725.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -814.2 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2018-11-12 16:33:41,929 INFO L168 Benchmark]: Boogie Preprocessor took 110.38 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2018-11-12 16:33:41,930 INFO L168 Benchmark]: RCFGBuilder took 3561.54 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 132.5 MB). Peak memory consumption was 132.5 MB. Max. memory is 7.1 GB. [2018-11-12 16:33:41,931 INFO L168 Benchmark]: TraceAbstraction took 208189.60 ms. Allocated memory was 2.2 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -201.4 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-11-12 16:33:41,935 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 801.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 150.19 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 725.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -814.2 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.38 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3561.54 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 132.5 MB). Peak memory consumption was 132.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208189.60 ms. Allocated memory was 2.2 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -201.4 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 85). Cancelled while BasicCegarLoop was constructing difference of abstraction (13761states) and FLOYD_HOARE automaton (currently 2 states, 7 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, 208.1s OverallTime, 16 OverallIterations, 9 TraceHistogramMax, 156.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2104 SDtfs, 33467 SDslu, 3606 SDs, 0 SdLazy, 41813 SolverSat, 6704 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60.1s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 13354 GetRequests, 12928 SyntacticMatches, 8 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5014 ImplicationChecksByTransitivity, 19.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13761occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.8s AbstIntTime, 13 AbstIntIterations, 6 AbstIntStrong, 0.997405096445 AbsIntWeakeningRatio, 0.0825 AbsIntAvgWeakeningVarsNumRemoved, 16.179166666666667 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 15 MinimizatonAttempts, 4844 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 19.8s InterpolantComputationTime, 13864 NumberOfCodeBlocks, 13864 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 19102 ConstructedInterpolants, 0 QuantifiedInterpolants, 49547130 SizeOfPredicates, 15 NumberOfNonLiveVariables, 7543 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 34976/38920 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown