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_label43_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:02:18,175 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:02:18,177 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:02:18,194 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:02:18,194 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:02:18,196 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:02:18,197 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:02:18,200 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:02:18,203 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:02:18,204 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:02:18,207 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:02:18,208 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:02:18,209 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:02:18,210 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:02:18,211 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:02:18,212 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:02:18,213 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:02:18,215 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:02:18,217 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:02:18,219 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:02:18,220 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:02:18,221 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:02:18,226 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:02:18,226 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:02:18,227 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:02:18,228 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:02:18,229 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:02:18,230 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:02:18,231 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:02:18,232 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:02:18,232 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:02:18,233 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:02:18,233 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:02:18,233 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:02:18,234 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:02:18,235 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:02:18,235 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:02:18,263 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:02:18,263 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:02:18,265 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:02:18,265 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:02:18,265 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:02:18,266 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:02:18,266 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:02:18,266 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:02:18,266 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:02:18,266 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:02:18,267 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:02:18,267 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:02:18,267 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:02:18,268 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:02:18,268 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:02:18,270 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:02:18,270 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:02:18,270 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:02:18,270 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:02:18,270 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:02:18,270 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:02:18,271 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:02:18,271 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:02:18,271 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:02:18,271 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:02:18,272 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:02:18,273 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:02:18,274 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:02:18,274 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:02:18,274 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:02:18,275 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:02:18,275 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:02:18,275 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:02:18,275 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:02:18,275 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:02:18,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:02:18,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:02:18,351 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:02:18,353 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:02:18,353 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:02:18,354 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label43_false-unreach-call_false-termination.c [2018-11-07 18:02:18,429 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19680baf/65340ae72ac84afb9df166d34c6e83de/FLAG7eb19b814 [2018-11-07 18:02:19,028 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:02:19,028 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label43_false-unreach-call_false-termination.c [2018-11-07 18:02:19,050 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19680baf/65340ae72ac84afb9df166d34c6e83de/FLAG7eb19b814 [2018-11-07 18:02:19,079 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19680baf/65340ae72ac84afb9df166d34c6e83de [2018-11-07 18:02:19,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:02:19,095 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:02:19,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:02:19,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:02:19,100 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:02:19,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:19,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c298bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19, skipping insertion in model container [2018-11-07 18:02:19,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:19,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:02:19,201 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:02:19,705 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:02:19,709 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:02:19,842 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:02:19,862 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:02:19,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19 WrapperNode [2018-11-07 18:02:19,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:02:19,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:02:19,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:02:19,864 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:02:19,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:19,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:19,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:02:19,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:02:19,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:02:19,996 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:02:20,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:20,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:20,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:20,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:20,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:20,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:20,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... [2018-11-07 18:02:20,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:02:20,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:02:20,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:02:20,127 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:02:20,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:02:20,198 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:02:20,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:02:20,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:02:20,198 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:02:20,199 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:02:20,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:02:20,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:02:20,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:02:20,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:02:23,808 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:02:23,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:02:23 BoogieIcfgContainer [2018-11-07 18:02:23,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:02:23,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:02:23,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:02:23,814 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:02:23,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:02:19" (1/3) ... [2018-11-07 18:02:23,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dafe71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:02:23, skipping insertion in model container [2018-11-07 18:02:23,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:02:19" (2/3) ... [2018-11-07 18:02:23,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dafe71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:02:23, skipping insertion in model container [2018-11-07 18:02:23,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:02:23" (3/3) ... [2018-11-07 18:02:23,819 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label43_false-unreach-call_false-termination.c [2018-11-07 18:02:23,830 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:02:23,839 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:02:23,858 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:02:23,898 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:02:23,899 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:02:23,899 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:02:23,899 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:02:23,899 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:02:23,899 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:02:23,900 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:02:23,900 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:02:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 18:02:23,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-07 18:02:23,937 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:23,939 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] [2018-11-07 18:02:23,941 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:23,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1620735268, now seen corresponding path program 1 times [2018-11-07 18:02:23,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:24,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:24,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:24,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:24,003 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:24,286 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:02:24,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:02:24,286 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:24,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:02:24,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:02:24,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:02:24,307 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 18:02:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:26,190 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 18:02:26,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:02:26,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-11-07 18:02:26,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:26,213 INFO L225 Difference]: With dead ends: 691 [2018-11-07 18:02:26,214 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 18:02:26,222 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:02:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 18:02:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 18:02:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 18:02:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 18:02:26,316 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 22 [2018-11-07 18:02:26,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:26,317 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 18:02:26,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:02:26,318 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 18:02:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-07 18:02:26,328 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:26,332 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:02:26,332 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:26,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1438641935, now seen corresponding path program 1 times [2018-11-07 18:02:26,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:26,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:26,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:26,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:26,337 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:26,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:02:26,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:02:26,747 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:26,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:02:26,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:02:26,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:02:26,751 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 18:02:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:28,890 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 18:02:28,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:02:28,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2018-11-07 18:02:28,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:28,901 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 18:02:28,901 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 18:02:28,904 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:02:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 18:02:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 18:02:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 18:02:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 18:02:28,950 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 109 [2018-11-07 18:02:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:28,951 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 18:02:28,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:02:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 18:02:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-07 18:02:28,954 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:28,955 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:02:28,955 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:28,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:28,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1680025772, now seen corresponding path program 1 times [2018-11-07 18:02:28,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:28,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:28,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:28,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:28,957 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:29,124 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:02:29,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:02:29,124 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:29,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:02:29,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:02:29,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:02:29,126 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-07 18:02:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:33,269 INFO L93 Difference]: Finished difference Result 2350 states and 4002 transitions. [2018-11-07 18:02:33,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:02:33,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2018-11-07 18:02:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:33,288 INFO L225 Difference]: With dead ends: 2350 [2018-11-07 18:02:33,288 INFO L226 Difference]: Without dead ends: 1731 [2018-11-07 18:02:33,297 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:02:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-11-07 18:02:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-11-07 18:02:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-11-07 18:02:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2678 transitions. [2018-11-07 18:02:33,383 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2678 transitions. Word has length 118 [2018-11-07 18:02:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:33,383 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 2678 transitions. [2018-11-07 18:02:33,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:02:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2678 transitions. [2018-11-07 18:02:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-11-07 18:02:33,397 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:33,398 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:02:33,398 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:33,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1765816872, now seen corresponding path program 1 times [2018-11-07 18:02:33,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:33,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:33,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:33,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:33,401 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:34,083 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-07 18:02:34,468 WARN L179 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2018-11-07 18:02:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:34,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:34,988 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:02:34,989 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2018-11-07 18:02:34,991 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:02:35,048 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:02:35,048 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:02:35,755 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:02:35,759 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:02:35,763 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 18:02:35,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:35,811 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:02:36,458 INFO L227 lantSequenceWeakener]: Weakened 213 states. On average, predicates are now at 77.34% of their original sizes. [2018-11-07 18:02:36,458 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:02:36,815 INFO L415 sIntCurrentIteration]: We unified 221 AI predicates to 221 [2018-11-07 18:02:36,815 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:02:36,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:02:36,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2018-11-07 18:02:36,816 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:36,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:02:36,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:02:36,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:02:36,818 INFO L87 Difference]: Start difference. First operand 1731 states and 2678 transitions. Second operand 7 states. [2018-11-07 18:02:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:46,688 INFO L93 Difference]: Finished difference Result 3641 states and 5641 transitions. [2018-11-07 18:02:46,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:02:46,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 222 [2018-11-07 18:02:46,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:46,705 INFO L225 Difference]: With dead ends: 3641 [2018-11-07 18:02:46,706 INFO L226 Difference]: Without dead ends: 1916 [2018-11-07 18:02:46,716 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 222 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:02:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2018-11-07 18:02:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1914. [2018-11-07 18:02:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1914 states. [2018-11-07 18:02:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2869 transitions. [2018-11-07 18:02:46,783 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2869 transitions. Word has length 222 [2018-11-07 18:02:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:46,784 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 2869 transitions. [2018-11-07 18:02:46,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:02:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2869 transitions. [2018-11-07 18:02:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-11-07 18:02:46,793 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:46,794 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 18:02:46,794 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:46,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:46,796 INFO L82 PathProgramCache]: Analyzing trace with hash -709448537, now seen corresponding path program 1 times [2018-11-07 18:02:46,796 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:46,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:46,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:46,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:46,799 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 133 proven. 164 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:02:47,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:47,683 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:02:47,683 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 308 with the following transitions: [2018-11-07 18:02:47,684 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:02:47,690 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:02:47,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:02:47,830 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:02:48,027 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:02:48,028 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:02:48,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:48,067 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:02:48,919 INFO L227 lantSequenceWeakener]: Weakened 90 states. On average, predicates are now at 77.9% of their original sizes. [2018-11-07 18:02:48,920 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:02:50,626 INFO L415 sIntCurrentIteration]: We unified 306 AI predicates to 306 [2018-11-07 18:02:50,626 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:02:50,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:02:50,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [12] total 34 [2018-11-07 18:02:50,627 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:50,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-07 18:02:50,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-07 18:02:50,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2018-11-07 18:02:50,629 INFO L87 Difference]: Start difference. First operand 1914 states and 2869 transitions. Second operand 24 states. [2018-11-07 18:03:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:10,101 INFO L93 Difference]: Finished difference Result 4353 states and 6425 transitions. [2018-11-07 18:03:10,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-07 18:03:10,101 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 307 [2018-11-07 18:03:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:10,113 INFO L225 Difference]: With dead ends: 4353 [2018-11-07 18:03:10,113 INFO L226 Difference]: Without dead ends: 1919 [2018-11-07 18:03:10,125 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 321 GetRequests, 280 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 18:03:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2018-11-07 18:03:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1914. [2018-11-07 18:03:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1914 states. [2018-11-07 18:03:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2863 transitions. [2018-11-07 18:03:10,179 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2863 transitions. Word has length 307 [2018-11-07 18:03:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:10,180 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 2863 transitions. [2018-11-07 18:03:10,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-07 18:03:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2863 transitions. [2018-11-07 18:03:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-11-07 18:03:10,188 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:10,189 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:03:10,189 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:10,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2029899283, now seen corresponding path program 1 times [2018-11-07 18:03:10,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:10,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:10,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:10,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:10,191 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:10,695 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:03:10,908 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 18:03:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 58 proven. 267 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:03:11,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:11,607 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:11,607 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-11-07 18:03:11,608 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:03:11,612 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:11,612 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:11,694 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:11,827 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:03:11,828 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:03:11,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:11,853 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:03:12,644 INFO L227 lantSequenceWeakener]: Weakened 108 states. On average, predicates are now at 77.9% of their original sizes. [2018-11-07 18:03:12,645 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:03:13,333 INFO L415 sIntCurrentIteration]: We unified 332 AI predicates to 332 [2018-11-07 18:03:13,334 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:03:13,334 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:03:13,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-07 18:03:13,335 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:03:13,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 18:03:13,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 18:03:13,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:03:13,337 INFO L87 Difference]: Start difference. First operand 1914 states and 2863 transitions. Second operand 21 states. [2018-11-07 18:03:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:30,171 INFO L93 Difference]: Finished difference Result 4016 states and 6142 transitions. [2018-11-07 18:03:30,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 18:03:30,171 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 333 [2018-11-07 18:03:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:30,184 INFO L225 Difference]: With dead ends: 4016 [2018-11-07 18:03:30,184 INFO L226 Difference]: Without dead ends: 2291 [2018-11-07 18:03:30,195 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 350 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 18:03:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2018-11-07 18:03:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2286. [2018-11-07 18:03:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2286 states. [2018-11-07 18:03:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 3265 transitions. [2018-11-07 18:03:30,259 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 3265 transitions. Word has length 333 [2018-11-07 18:03:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:30,260 INFO L480 AbstractCegarLoop]: Abstraction has 2286 states and 3265 transitions. [2018-11-07 18:03:30,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 18:03:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 3265 transitions. [2018-11-07 18:03:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-11-07 18:03:30,273 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:30,274 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:03:30,274 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:30,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1819803468, now seen corresponding path program 1 times [2018-11-07 18:03:30,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:30,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:30,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:30,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:30,277 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 153 proven. 166 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2018-11-07 18:03:30,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:30,948 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:30,948 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 419 with the following transitions: [2018-11-07 18:03:30,948 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:03:30,953 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:30,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:31,059 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:31,426 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:03:31,427 INFO L272 AbstractInterpreter]: Visited 124 different actions 368 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:03:31,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:31,469 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:03:31,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:31,469 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:03:31,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:31,489 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:03:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:31,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:03:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 479 proven. 2 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-11-07 18:03:32,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:03:32,533 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 18:03:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 153 proven. 166 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2018-11-07 18:03:33,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:03:33,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 18:03:33,482 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:03:33,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:03:33,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:03:33,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:03:33,483 INFO L87 Difference]: Start difference. First operand 2286 states and 3265 transitions. Second operand 9 states. [2018-11-07 18:03:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:38,120 INFO L93 Difference]: Finished difference Result 5691 states and 8525 transitions. [2018-11-07 18:03:38,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:03:38,121 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 418 [2018-11-07 18:03:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:38,142 INFO L225 Difference]: With dead ends: 5691 [2018-11-07 18:03:38,142 INFO L226 Difference]: Without dead ends: 3598 [2018-11-07 18:03:38,160 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 843 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2018-11-07 18:03:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2018-11-07 18:03:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3409. [2018-11-07 18:03:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3409 states. [2018-11-07 18:03:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 4713 transitions. [2018-11-07 18:03:38,257 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 4713 transitions. Word has length 418 [2018-11-07 18:03:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:38,258 INFO L480 AbstractCegarLoop]: Abstraction has 3409 states and 4713 transitions. [2018-11-07 18:03:38,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:03:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 4713 transitions. [2018-11-07 18:03:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2018-11-07 18:03:38,271 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:38,272 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:03:38,272 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:38,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:38,272 INFO L82 PathProgramCache]: Analyzing trace with hash 102268371, now seen corresponding path program 1 times [2018-11-07 18:03:38,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:38,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:38,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:38,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:38,274 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:39,297 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:03:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 171 proven. 432 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:03:39,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:39,864 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:39,864 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 422 with the following transitions: [2018-11-07 18:03:39,865 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:03:39,869 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:39,869 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:40,077 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:40,376 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:03:40,377 INFO L272 AbstractInterpreter]: Visited 124 different actions 365 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:03:40,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:40,414 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:03:40,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:40,415 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:03:40,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:40,429 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:03:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:40,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:03:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 372 proven. 135 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-11-07 18:03:41,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:03:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 83 proven. 435 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-07 18:03:42,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:03:42,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 23 [2018-11-07 18:03:42,560 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:03:42,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:03:42,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:03:42,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-11-07 18:03:42,562 INFO L87 Difference]: Start difference. First operand 3409 states and 4713 transitions. Second operand 18 states. [2018-11-07 18:03:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:49,976 INFO L93 Difference]: Finished difference Result 8577 states and 12082 transitions. [2018-11-07 18:03:49,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 18:03:49,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 421 [2018-11-07 18:03:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:50,007 INFO L225 Difference]: With dead ends: 8577 [2018-11-07 18:03:50,007 INFO L226 Difference]: Without dead ends: 5331 [2018-11-07 18:03:50,028 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 858 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=510, Invalid=1652, Unknown=0, NotChecked=0, Total=2162 [2018-11-07 18:03:50,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5331 states. [2018-11-07 18:03:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5331 to 5096. [2018-11-07 18:03:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5096 states. [2018-11-07 18:03:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5096 states to 5096 states and 6547 transitions. [2018-11-07 18:03:50,159 INFO L78 Accepts]: Start accepts. Automaton has 5096 states and 6547 transitions. Word has length 421 [2018-11-07 18:03:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:50,159 INFO L480 AbstractCegarLoop]: Abstraction has 5096 states and 6547 transitions. [2018-11-07 18:03:50,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:03:50,159 INFO L276 IsEmpty]: Start isEmpty. Operand 5096 states and 6547 transitions. [2018-11-07 18:03:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-11-07 18:03:50,177 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:50,177 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:03:50,178 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:50,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:50,178 INFO L82 PathProgramCache]: Analyzing trace with hash 489201031, now seen corresponding path program 1 times [2018-11-07 18:03:50,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:50,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:50,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:50,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:50,179 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:51,352 WARN L179 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-11-07 18:03:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 325 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-07 18:03:51,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:51,744 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:51,744 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 444 with the following transitions: [2018-11-07 18:03:51,744 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:03:51,748 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:51,748 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:51,829 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:52,073 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:03:52,073 INFO L272 AbstractInterpreter]: Visited 123 different actions 366 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:03:52,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:52,099 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:03:52,641 INFO L227 lantSequenceWeakener]: Weakened 440 states. On average, predicates are now at 80.07% of their original sizes. [2018-11-07 18:03:52,641 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:03:53,242 INFO L415 sIntCurrentIteration]: We unified 442 AI predicates to 442 [2018-11-07 18:03:53,243 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:03:53,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:03:53,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 18:03:53,244 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:03:53,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:03:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:03:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:03:53,245 INFO L87 Difference]: Start difference. First operand 5096 states and 6547 transitions. Second operand 10 states. [2018-11-07 18:04:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:01,888 INFO L93 Difference]: Finished difference Result 10411 states and 13629 transitions. [2018-11-07 18:04:01,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:04:01,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 443 [2018-11-07 18:04:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:01,915 INFO L225 Difference]: With dead ends: 10411 [2018-11-07 18:04:01,915 INFO L226 Difference]: Without dead ends: 5689 [2018-11-07 18:04:01,937 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 450 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:04:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2018-11-07 18:04:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 5656. [2018-11-07 18:04:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5656 states. [2018-11-07 18:04:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 7225 transitions. [2018-11-07 18:04:02,068 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 7225 transitions. Word has length 443 [2018-11-07 18:04:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:02,068 INFO L480 AbstractCegarLoop]: Abstraction has 5656 states and 7225 transitions. [2018-11-07 18:04:02,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:04:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 7225 transitions. [2018-11-07 18:04:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-11-07 18:04:02,085 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:02,086 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:02,086 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:02,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:02,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1479683768, now seen corresponding path program 1 times [2018-11-07 18:04:02,087 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:02,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:02,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:02,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:02,088 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:03,523 WARN L179 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 18:04:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 294 proven. 273 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:04:04,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:04,672 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:04,672 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 511 with the following transitions: [2018-11-07 18:04:04,672 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:04,676 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:04,676 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:04,893 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:05,506 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:05,506 INFO L272 AbstractInterpreter]: Visited 191 different actions 953 times. Merged at 9 different actions 46 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:04:05,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:05,514 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:05,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:05,514 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:04:05,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:05,523 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:05,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-11-07 18:04:06,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 292 proven. 86 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-07 18:04:07,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:07,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-07 18:04:07,091 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:07,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:04:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:04:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:04:07,093 INFO L87 Difference]: Start difference. First operand 5656 states and 7225 transitions. Second operand 17 states. [2018-11-07 18:04:07,947 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-11-07 18:04:08,686 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2018-11-07 18:04:10,390 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-07 18:04:11,347 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2018-11-07 18:04:11,652 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2018-11-07 18:04:12,001 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-07 18:04:13,003 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2018-11-07 18:04:16,149 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2018-11-07 18:04:16,465 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-11-07 18:04:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:17,727 INFO L93 Difference]: Finished difference Result 11750 states and 15624 transitions. [2018-11-07 18:04:17,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-07 18:04:17,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 510 [2018-11-07 18:04:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:17,759 INFO L225 Difference]: With dead ends: 11750 [2018-11-07 18:04:17,759 INFO L226 Difference]: Without dead ends: 6468 [2018-11-07 18:04:17,776 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1053 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 18:04:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2018-11-07 18:04:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 6336. [2018-11-07 18:04:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6336 states. [2018-11-07 18:04:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6336 states to 6336 states and 7691 transitions. [2018-11-07 18:04:17,921 INFO L78 Accepts]: Start accepts. Automaton has 6336 states and 7691 transitions. Word has length 510 [2018-11-07 18:04:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:17,922 INFO L480 AbstractCegarLoop]: Abstraction has 6336 states and 7691 transitions. [2018-11-07 18:04:17,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:04:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand 6336 states and 7691 transitions. [2018-11-07 18:04:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2018-11-07 18:04:17,942 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:17,943 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:17,943 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:17,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash 679395416, now seen corresponding path program 1 times [2018-11-07 18:04:17,943 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:17,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:17,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:17,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:17,945 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 406 proven. 433 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-11-07 18:04:19,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:19,606 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:19,606 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 529 with the following transitions: [2018-11-07 18:04:19,606 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:19,609 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:19,609 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:19,697 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:20,007 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:20,007 INFO L272 AbstractInterpreter]: Visited 125 different actions 620 times. Merged at 8 different actions 41 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:04:20,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:20,013 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:20,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:20,013 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:04:20,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:20,022 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:20,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 715 proven. 2 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2018-11-07 18:04:20,988 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 400 proven. 86 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-11-07 18:04:21,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:21,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 14 [2018-11-07 18:04:21,496 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:21,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 18:04:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 18:04:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:04:21,497 INFO L87 Difference]: Start difference. First operand 6336 states and 7691 transitions. Second operand 13 states. [2018-11-07 18:04:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:26,945 INFO L93 Difference]: Finished difference Result 12865 states and 16270 transitions. [2018-11-07 18:04:26,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 18:04:26,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 528 [2018-11-07 18:04:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:26,978 INFO L225 Difference]: With dead ends: 12865 [2018-11-07 18:04:26,978 INFO L226 Difference]: Without dead ends: 6657 [2018-11-07 18:04:26,994 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1088 GetRequests, 1063 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2018-11-07 18:04:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2018-11-07 18:04:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 6518. [2018-11-07 18:04:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6518 states. [2018-11-07 18:04:27,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 7690 transitions. [2018-11-07 18:04:27,243 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 7690 transitions. Word has length 528 [2018-11-07 18:04:27,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:27,243 INFO L480 AbstractCegarLoop]: Abstraction has 6518 states and 7690 transitions. [2018-11-07 18:04:27,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 18:04:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 7690 transitions. [2018-11-07 18:04:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2018-11-07 18:04:27,254 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:27,255 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:27,255 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:27,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2028625144, now seen corresponding path program 1 times [2018-11-07 18:04:27,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:27,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:27,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:27,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:27,257 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 432 proven. 463 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-11-07 18:04:28,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:28,840 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:28,840 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 577 with the following transitions: [2018-11-07 18:04:28,840 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [746], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:28,842 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:28,842 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:28,899 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:29,246 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:29,246 INFO L272 AbstractInterpreter]: Visited 145 different actions 574 times. Merged at 8 different actions 30 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:04:29,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:29,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:29,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:29,252 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:04:29,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:29,261 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:29,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 430 proven. 2 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2018-11-07 18:04:29,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 430 proven. 2 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2018-11-07 18:04:30,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:30,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 18 [2018-11-07 18:04:30,172 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:30,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:04:30,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:04:30,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:04:30,174 INFO L87 Difference]: Start difference. First operand 6518 states and 7690 transitions. Second operand 17 states. [2018-11-07 18:04:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:37,817 INFO L93 Difference]: Finished difference Result 14420 states and 18509 transitions. [2018-11-07 18:04:37,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-07 18:04:37,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 576 [2018-11-07 18:04:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:37,846 INFO L225 Difference]: With dead ends: 14420 [2018-11-07 18:04:37,846 INFO L226 Difference]: Without dead ends: 7581 [2018-11-07 18:04:37,871 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1232 GetRequests, 1173 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=697, Invalid=2725, Unknown=0, NotChecked=0, Total=3422 [2018-11-07 18:04:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2018-11-07 18:04:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 7402. [2018-11-07 18:04:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7402 states. [2018-11-07 18:04:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8408 transitions. [2018-11-07 18:04:38,031 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8408 transitions. Word has length 576 [2018-11-07 18:04:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:38,032 INFO L480 AbstractCegarLoop]: Abstraction has 7402 states and 8408 transitions. [2018-11-07 18:04:38,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:04:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8408 transitions. [2018-11-07 18:04:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2018-11-07 18:04:38,041 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:38,041 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:38,042 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:38,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1417856340, now seen corresponding path program 1 times [2018-11-07 18:04:38,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:38,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:38,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:38,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:38,044 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 433 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-11-07 18:04:38,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:38,629 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:38,629 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 629 with the following transitions: [2018-11-07 18:04:38,629 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:38,632 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:38,632 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:38,846 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:39,589 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:39,589 INFO L272 AbstractInterpreter]: Visited 192 different actions 965 times. Merged at 10 different actions 53 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:04:39,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:39,597 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:39,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:39,597 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:04:39,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:39,608 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:39,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 750 proven. 2 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2018-11-07 18:04:40,058 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 433 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-11-07 18:04:40,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:40,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:04:40,471 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:40,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:04:40,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:04:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:04:40,473 INFO L87 Difference]: Start difference. First operand 7402 states and 8408 transitions. Second operand 7 states. [2018-11-07 18:04:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:42,531 INFO L93 Difference]: Finished difference Result 22718 states and 29241 transitions. [2018-11-07 18:04:42,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:04:42,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 628 [2018-11-07 18:04:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:42,606 INFO L225 Difference]: With dead ends: 22718 [2018-11-07 18:04:42,606 INFO L226 Difference]: Without dead ends: 15690 [2018-11-07 18:04:42,645 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1272 GetRequests, 1259 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:04:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15690 states. [2018-11-07 18:04:42,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15690 to 14928. [2018-11-07 18:04:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14928 states. [2018-11-07 18:04:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14928 states to 14928 states and 17214 transitions. [2018-11-07 18:04:43,020 INFO L78 Accepts]: Start accepts. Automaton has 14928 states and 17214 transitions. Word has length 628 [2018-11-07 18:04:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:43,021 INFO L480 AbstractCegarLoop]: Abstraction has 14928 states and 17214 transitions. [2018-11-07 18:04:43,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:04:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 14928 states and 17214 transitions. [2018-11-07 18:04:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2018-11-07 18:04:43,034 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:43,035 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:43,035 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:43,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:43,035 INFO L82 PathProgramCache]: Analyzing trace with hash -125966940, now seen corresponding path program 1 times [2018-11-07 18:04:43,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:43,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:43,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:43,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:43,037 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 616 proven. 86 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-11-07 18:04:44,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:44,144 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:44,144 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 789 with the following transitions: [2018-11-07 18:04:44,144 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:44,147 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:44,147 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:44,313 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:45,158 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:45,159 INFO L272 AbstractInterpreter]: Visited 193 different actions 1168 times. Merged at 11 different actions 70 times. Widened at 1 different actions 2 times. Found 20 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:04:45,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:45,169 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:45,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:45,169 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:04:45,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:45,178 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:45,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 1015 proven. 2 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-11-07 18:04:45,931 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 616 proven. 86 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-11-07 18:04:46,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:46,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:04:46,467 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:46,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:04:46,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:04:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:04:46,469 INFO L87 Difference]: Start difference. First operand 14928 states and 17214 transitions. Second operand 7 states. [2018-11-07 18:04:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:48,370 INFO L93 Difference]: Finished difference Result 30000 states and 34779 transitions. [2018-11-07 18:04:48,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:04:48,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 788 [2018-11-07 18:04:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:48,412 INFO L225 Difference]: With dead ends: 30000 [2018-11-07 18:04:48,412 INFO L226 Difference]: Without dead ends: 15446 [2018-11-07 18:04:48,444 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1591 GetRequests, 1578 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:04:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15446 states. [2018-11-07 18:04:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15446 to 14930. [2018-11-07 18:04:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14930 states. [2018-11-07 18:04:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14930 states to 14930 states and 17008 transitions. [2018-11-07 18:04:48,734 INFO L78 Accepts]: Start accepts. Automaton has 14930 states and 17008 transitions. Word has length 788 [2018-11-07 18:04:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:48,735 INFO L480 AbstractCegarLoop]: Abstraction has 14930 states and 17008 transitions. [2018-11-07 18:04:48,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:04:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 14930 states and 17008 transitions. [2018-11-07 18:04:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2018-11-07 18:04:48,749 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:48,749 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:48,750 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:48,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:48,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1223834549, now seen corresponding path program 1 times [2018-11-07 18:04:48,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:48,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:48,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:48,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:48,751 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 460 proven. 150 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2018-11-07 18:04:50,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:50,159 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:50,159 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 866 with the following transitions: [2018-11-07 18:04:50,160 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:50,162 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:50,163 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:50,313 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:51,159 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:51,160 INFO L272 AbstractInterpreter]: Visited 194 different actions 1186 times. Merged at 12 different actions 82 times. Widened at 1 different actions 2 times. Found 24 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:04:51,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:51,169 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:51,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:51,169 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:04:51,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:51,182 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:51,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 1389 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-11-07 18:04:52,034 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 460 proven. 150 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2018-11-07 18:04:52,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:52,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-11-07 18:04:52,444 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:52,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:04:52,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:04:52,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:04:52,446 INFO L87 Difference]: Start difference. First operand 14930 states and 17008 transitions. Second operand 10 states. [2018-11-07 18:04:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:55,448 INFO L93 Difference]: Finished difference Result 29534 states and 33727 transitions. [2018-11-07 18:04:55,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-07 18:04:55,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 865 [2018-11-07 18:04:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:55,481 INFO L225 Difference]: With dead ends: 29534 [2018-11-07 18:04:55,481 INFO L226 Difference]: Without dead ends: 14978 [2018-11-07 18:04:55,509 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1763 GetRequests, 1738 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2018-11-07 18:04:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14978 states. [2018-11-07 18:04:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14978 to 14824. [2018-11-07 18:04:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14824 states. [2018-11-07 18:04:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14824 states to 14824 states and 16219 transitions. [2018-11-07 18:04:55,754 INFO L78 Accepts]: Start accepts. Automaton has 14824 states and 16219 transitions. Word has length 865 [2018-11-07 18:04:55,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:55,754 INFO L480 AbstractCegarLoop]: Abstraction has 14824 states and 16219 transitions. [2018-11-07 18:04:55,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:04:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14824 states and 16219 transitions. [2018-11-07 18:04:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 877 [2018-11-07 18:04:55,767 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:55,767 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:55,768 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:55,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash -434010464, now seen corresponding path program 1 times [2018-11-07 18:04:55,768 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:55,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:55,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:55,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:55,769 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 492 proven. 1065 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2018-11-07 18:04:58,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:58,605 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:58,605 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 877 with the following transitions: [2018-11-07 18:04:58,606 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:58,608 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:58,609 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:58,756 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:59,636 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:59,636 INFO L272 AbstractInterpreter]: Visited 193 different actions 1167 times. Merged at 11 different actions 68 times. Widened at 1 different actions 2 times. Found 21 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:04:59,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:59,645 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:59,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:59,645 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:04:59,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:59,655 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:59,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:05:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1559 proven. 2 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2018-11-07 18:05:00,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:05:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 486 proven. 335 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2018-11-07 18:05:02,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:05:02,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 20 [2018-11-07 18:05:02,572 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:05:02,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:05:02,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:05:02,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:05:02,573 INFO L87 Difference]: Start difference. First operand 14824 states and 16219 transitions. Second operand 18 states. [2018-11-07 18:05:04,325 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2018-11-07 18:05:05,549 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2018-11-07 18:05:05,856 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2018-11-07 18:05:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:08,879 INFO L93 Difference]: Finished difference Result 30706 states and 33800 transitions. [2018-11-07 18:05:08,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-07 18:05:08,880 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 876 [2018-11-07 18:05:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:08,914 INFO L225 Difference]: With dead ends: 30706 [2018-11-07 18:05:08,914 INFO L226 Difference]: Without dead ends: 16256 [2018-11-07 18:05:08,934 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1809 GetRequests, 1765 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=433, Invalid=1547, Unknown=0, NotChecked=0, Total=1980 [2018-11-07 18:05:08,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16256 states. [2018-11-07 18:05:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16256 to 15666. [2018-11-07 18:05:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15666 states. [2018-11-07 18:05:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15666 states to 15666 states and 17056 transitions. [2018-11-07 18:05:09,212 INFO L78 Accepts]: Start accepts. Automaton has 15666 states and 17056 transitions. Word has length 876 [2018-11-07 18:05:09,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:09,213 INFO L480 AbstractCegarLoop]: Abstraction has 15666 states and 17056 transitions. [2018-11-07 18:05:09,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:05:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 15666 states and 17056 transitions. [2018-11-07 18:05:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2018-11-07 18:05:09,226 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:09,227 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:09,227 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:09,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:09,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1580636473, now seen corresponding path program 1 times [2018-11-07 18:05:09,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:09,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:09,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:09,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:09,229 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 492 proven. 1079 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2018-11-07 18:05:11,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:11,813 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:11,813 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 884 with the following transitions: [2018-11-07 18:05:11,813 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:11,815 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:11,816 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:11,952 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:12,622 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:05:12,622 INFO L272 AbstractInterpreter]: Visited 194 different actions 983 times. Merged at 11 different actions 61 times. Widened at 1 different actions 1 times. Found 19 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:05:12,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:12,627 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:05:12,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:12,627 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:05:12,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:12,636 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:05:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:12,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:05:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 1573 proven. 2 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2018-11-07 18:05:13,340 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:05:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 493 proven. 335 refuted. 0 times theorem prover too weak. 1361 trivial. 0 not checked. [2018-11-07 18:05:14,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:05:14,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-07 18:05:14,282 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:05:14,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:05:14,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:05:14,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:05:14,284 INFO L87 Difference]: Start difference. First operand 15666 states and 17056 transitions. Second operand 18 states. [2018-11-07 18:05:21,511 WARN L179 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2018-11-07 18:05:23,107 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-11-07 18:05:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:23,777 INFO L93 Difference]: Finished difference Result 31254 states and 34119 transitions. [2018-11-07 18:05:23,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-07 18:05:23,777 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 883 [2018-11-07 18:05:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:23,809 INFO L225 Difference]: With dead ends: 31254 [2018-11-07 18:05:23,809 INFO L226 Difference]: Without dead ends: 15779 [2018-11-07 18:05:23,834 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1856 GetRequests, 1793 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=850, Invalid=3310, Unknown=0, NotChecked=0, Total=4160 [2018-11-07 18:05:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15779 states. [2018-11-07 18:05:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15779 to 15315. [2018-11-07 18:05:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15315 states. [2018-11-07 18:05:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15315 states to 15315 states and 16542 transitions. [2018-11-07 18:05:24,100 INFO L78 Accepts]: Start accepts. Automaton has 15315 states and 16542 transitions. Word has length 883 [2018-11-07 18:05:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:24,101 INFO L480 AbstractCegarLoop]: Abstraction has 15315 states and 16542 transitions. [2018-11-07 18:05:24,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:05:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 15315 states and 16542 transitions. [2018-11-07 18:05:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 929 [2018-11-07 18:05:24,289 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:24,290 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:24,290 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:24,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:24,291 INFO L82 PathProgramCache]: Analyzing trace with hash -98974472, now seen corresponding path program 1 times [2018-11-07 18:05:24,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:24,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:24,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:24,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:24,292 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 1182 proven. 6 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2018-11-07 18:05:25,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:25,615 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:25,616 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 929 with the following transitions: [2018-11-07 18:05:25,616 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:25,622 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:25,622 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:25,832 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:26,753 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:05:26,753 INFO L272 AbstractInterpreter]: Visited 194 different actions 1173 times. Merged at 11 different actions 68 times. Widened at 1 different actions 2 times. Found 25 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:05:26,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:26,782 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:05:26,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:26,782 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:05:26,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:26,798 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:05:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:27,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:05:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 1182 proven. 6 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2018-11-07 18:05:28,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:05:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 1182 proven. 86 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2018-11-07 18:05:28,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:05:28,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 13 [2018-11-07 18:05:28,944 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:05:28,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:05:28,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:05:28,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-11-07 18:05:28,946 INFO L87 Difference]: Start difference. First operand 15315 states and 16542 transitions. Second operand 8 states. [2018-11-07 18:05:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:32,934 INFO L93 Difference]: Finished difference Result 35938 states and 38944 transitions. [2018-11-07 18:05:32,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:05:32,934 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 928 [2018-11-07 18:05:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:32,978 INFO L225 Difference]: With dead ends: 35938 [2018-11-07 18:05:32,978 INFO L226 Difference]: Without dead ends: 20814 [2018-11-07 18:05:32,998 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1879 GetRequests, 1858 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:05:33,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20814 states. [2018-11-07 18:05:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20814 to 19640. [2018-11-07 18:05:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19640 states. [2018-11-07 18:05:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19640 states to 19640 states and 21273 transitions. [2018-11-07 18:05:33,330 INFO L78 Accepts]: Start accepts. Automaton has 19640 states and 21273 transitions. Word has length 928 [2018-11-07 18:05:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:33,331 INFO L480 AbstractCegarLoop]: Abstraction has 19640 states and 21273 transitions. [2018-11-07 18:05:33,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:05:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 19640 states and 21273 transitions. [2018-11-07 18:05:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1503 [2018-11-07 18:05:33,367 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:33,367 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:33,368 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:33,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:33,368 INFO L82 PathProgramCache]: Analyzing trace with hash 2125496412, now seen corresponding path program 1 times [2018-11-07 18:05:33,369 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:33,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:33,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:33,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:33,370 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6333 backedges. 1215 proven. 3890 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2018-11-07 18:05:37,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:37,328 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:37,328 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1503 with the following transitions: [2018-11-07 18:05:37,328 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [690], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [778], [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], [931], [934], [935], [939], [943], [946], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:37,330 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:37,331 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:37,483 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:38,325 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:05:38,326 INFO L272 AbstractInterpreter]: Visited 201 different actions 1228 times. Merged at 13 different actions 81 times. Widened at 1 different actions 2 times. Found 37 fixpoints after 7 different actions. Largest state had 24 variables. [2018-11-07 18:05:38,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:38,331 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:05:38,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:38,331 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:05:38,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:38,340 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:05:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:38,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:05:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6333 backedges. 2103 proven. 2 refuted. 0 times theorem prover too weak. 4228 trivial. 0 not checked. [2018-11-07 18:05:40,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:05:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6333 backedges. 1304 proven. 86 refuted. 0 times theorem prover too weak. 4943 trivial. 0 not checked. [2018-11-07 18:05:42,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:05:42,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 5, 5] total 26 [2018-11-07 18:05:42,411 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:05:42,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-07 18:05:42,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-07 18:05:42,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2018-11-07 18:05:42,413 INFO L87 Difference]: Start difference. First operand 19640 states and 21273 transitions. Second operand 24 states. [2018-11-07 18:05:47,867 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 18 Received shutdown request... [2018-11-07 18:05:49,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 18:05:49,494 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:05:49,499 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:05:49,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:05:49 BoogieIcfgContainer [2018-11-07 18:05:49,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:05:49,501 INFO L168 Benchmark]: Toolchain (without parser) took 210407.38 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: -18.1 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-11-07 18:05:49,502 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:05:49,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 767.14 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. [2018-11-07 18:05:49,503 INFO L168 Benchmark]: Boogie Procedure Inliner took 132.40 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 738.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -841.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:05:49,503 INFO L168 Benchmark]: Boogie Preprocessor took 130.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:05:49,504 INFO L168 Benchmark]: RCFGBuilder took 3682.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.9 MB). Peak memory consumption was 129.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:05:49,505 INFO L168 Benchmark]: TraceAbstraction took 205689.24 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.4 GB in the end (delta: 634.4 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-11-07 18:05:49,510 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 767.14 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 132.40 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 738.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -841.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3682.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.9 MB). Peak memory consumption was 129.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205689.24 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.4 GB in the end (delta: 634.4 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 49). Cancelled while BasicCegarLoop was constructing difference of abstraction (19640states) and FLOYD_HOARE automaton (currently 33 states, 24 states before enhancement),while ReachableStatesComputation was computing reachable states (11585 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 205.6s OverallTime, 19 OverallIterations, 12 TraceHistogramMax, 133.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2350 SDtfs, 45977 SDslu, 4751 SDs, 0 SdLazy, 57158 SolverSat, 7970 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 64.5s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 19826 GetRequests, 19259 SyntacticMatches, 25 SemanticMatches, 542 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6179 ImplicationChecksByTransitivity, 29.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19640occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 11.5s AbstIntTime, 16 AbstIntIterations, 4 AbstIntStrong, 0.9969788101300221 AbsIntWeakeningRatio, 0.0983858570330515 AbsIntAvgWeakeningVarsNumRemoved, 16.63643351268255 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 18 MinimizatonAttempts, 4588 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 34.4s InterpolantComputationTime, 19400 NumberOfCodeBlocks, 19400 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 28280 ConstructedInterpolants, 0 QuantifiedInterpolants, 99213306 SizeOfPredicates, 35 NumberOfNonLiveVariables, 12947 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 43 InterpolantComputations, 3 PerfectInterpolantSequences, 56434/67098 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown