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_label42_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:37:36,415 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:37:36,418 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:37:36,430 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:37:36,430 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:37:36,431 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:37:36,433 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:37:36,435 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:37:36,436 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:37:36,437 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:37:36,438 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:37:36,438 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:37:36,439 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:37:36,440 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:37:36,441 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:37:36,442 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:37:36,443 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:37:36,445 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:37:36,447 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:37:36,449 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:37:36,450 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:37:36,451 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:37:36,453 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:37:36,454 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:37:36,454 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:37:36,455 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:37:36,456 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:37:36,457 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:37:36,457 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:37:36,458 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:37:36,459 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:37:36,459 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:37:36,460 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:37:36,460 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:37:36,461 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:37:36,462 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:37:36,462 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 20:37:36,477 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:37:36,477 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:37:36,478 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:37:36,479 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:37:36,479 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:37:36,479 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:37:36,479 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:37:36,479 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:37:36,479 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:37:36,480 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:37:36,480 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:37:36,480 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:37:36,480 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:37:36,481 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:37:36,481 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:37:36,481 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:37:36,481 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:37:36,482 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:37:36,482 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:37:36,482 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:37:36,482 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:37:36,482 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:37:36,483 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:37:36,483 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:37:36,483 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:37:36,483 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:37:36,483 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:37:36,484 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:37:36,484 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:37:36,484 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:37:36,484 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:37:36,484 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:37:36,484 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:37:36,485 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:37:36,485 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:37:36,528 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:37:36,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:37:36,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:37:36,547 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:37:36,547 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:37:36,548 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label42_true-unreach-call_false-termination.c [2018-11-07 20:37:36,615 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d25f94b/6973b1eebeec4c0bba6aa2d1f633e359/FLAG9c1372b21 [2018-11-07 20:37:37,266 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:37:37,269 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label42_true-unreach-call_false-termination.c [2018-11-07 20:37:37,288 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d25f94b/6973b1eebeec4c0bba6aa2d1f633e359/FLAG9c1372b21 [2018-11-07 20:37:37,311 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d25f94b/6973b1eebeec4c0bba6aa2d1f633e359 [2018-11-07 20:37:37,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:37:37,325 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:37:37,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:37:37,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:37:37,333 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:37:37,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:37:37" (1/1) ... [2018-11-07 20:37:37,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4688d22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:37, skipping insertion in model container [2018-11-07 20:37:37,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:37:37" (1/1) ... [2018-11-07 20:37:37,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:37:37,420 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:37:37,889 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:37:37,893 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:37:38,084 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:37:38,105 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:37:38,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38 WrapperNode [2018-11-07 20:37:38,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:37:38,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:37:38,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:37:38,109 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:37:38,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (1/1) ... [2018-11-07 20:37:38,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (1/1) ... [2018-11-07 20:37:38,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:37:38,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:37:38,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:37:38,256 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:37:38,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (1/1) ... [2018-11-07 20:37:38,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (1/1) ... [2018-11-07 20:37:38,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (1/1) ... [2018-11-07 20:37:38,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (1/1) ... [2018-11-07 20:37:38,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (1/1) ... [2018-11-07 20:37:38,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (1/1) ... [2018-11-07 20:37:38,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (1/1) ... [2018-11-07 20:37:38,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:37:38,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:37:38,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:37:38,380 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:37:38,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (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 20:37:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:37:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:37:38,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:37:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:37:38,456 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:37:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:37:38,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:37:38,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:37:38,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:37:42,051 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:37:42,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:37:42 BoogieIcfgContainer [2018-11-07 20:37:42,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:37:42,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:37:42,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:37:42,057 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:37:42,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:37:37" (1/3) ... [2018-11-07 20:37:42,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4e5728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:37:42, skipping insertion in model container [2018-11-07 20:37:42,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:38" (2/3) ... [2018-11-07 20:37:42,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4e5728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:37:42, skipping insertion in model container [2018-11-07 20:37:42,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:37:42" (3/3) ... [2018-11-07 20:37:42,061 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label42_true-unreach-call_false-termination.c [2018-11-07 20:37:42,069 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:37:42,083 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:37:42,101 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:37:42,143 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:37:42,143 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:37:42,143 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:37:42,144 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:37:42,144 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:37:42,145 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:37:42,145 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:37:42,146 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:37:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 20:37:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-07 20:37:42,186 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:42,187 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:37:42,189 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:42,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1589650361, now seen corresponding path program 1 times [2018-11-07 20:37:42,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:42,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:42,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:42,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:42,246 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:42,608 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:37:42,687 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 20:37:42,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:37:42,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 20:37:42,690 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:42,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:37:42,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:37:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:37:42,718 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 20:37:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:37:44,319 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 20:37:44,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:37:44,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2018-11-07 20:37:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:37:44,342 INFO L225 Difference]: With dead ends: 691 [2018-11-07 20:37:44,342 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 20:37:44,350 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 20:37:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 20:37:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 20:37:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 20:37:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 20:37:44,437 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 49 [2018-11-07 20:37:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:37:44,438 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 20:37:44,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:37:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 20:37:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-07 20:37:44,447 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:44,447 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:37:44,448 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:44,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash 192752175, now seen corresponding path program 1 times [2018-11-07 20:37:44,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:44,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:44,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:44,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:44,450 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:37:44,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:37:44,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:37:44,795 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:44,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:37:44,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:37:44,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:37:44,798 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 20:37:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:37:46,904 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 20:37:46,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:37:46,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-11-07 20:37:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:37:46,912 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 20:37:46,913 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 20:37:46,915 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 20:37:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 20:37:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 20:37:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 20:37:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 20:37:46,968 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 136 [2018-11-07 20:37:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:37:46,969 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 20:37:46,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:37:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 20:37:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-07 20:37:46,976 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:46,976 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:37:46,977 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:46,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1678139032, now seen corresponding path program 1 times [2018-11-07 20:37:46,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:46,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:46,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:46,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:46,979 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:37:47,213 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:37:47,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:37:47,213 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:47,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:37:47,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:37:47,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:37:47,215 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-07 20:37:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:37:51,450 INFO L93 Difference]: Finished difference Result 2352 states and 4016 transitions. [2018-11-07 20:37:51,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:37:51,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2018-11-07 20:37:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:37:51,473 INFO L225 Difference]: With dead ends: 2352 [2018-11-07 20:37:51,473 INFO L226 Difference]: Without dead ends: 1733 [2018-11-07 20:37:51,479 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 20:37:51,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2018-11-07 20:37:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1733. [2018-11-07 20:37:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-11-07 20:37:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2647 transitions. [2018-11-07 20:37:51,566 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2647 transitions. Word has length 145 [2018-11-07 20:37:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:37:51,567 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 2647 transitions. [2018-11-07 20:37:51,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:37:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2647 transitions. [2018-11-07 20:37:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-11-07 20:37:51,580 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:51,580 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:37:51,581 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:51,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1304221998, now seen corresponding path program 1 times [2018-11-07 20:37:51,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:51,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:51,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:51,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:51,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 84 proven. 107 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:37:52,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:37:52,119 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:37:52,120 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 275 with the following transitions: [2018-11-07 20:37:52,122 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:37:52,173 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:37:52,173 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:37:52,866 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:37:52,873 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:37:52,874 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 20:37:52,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:52,925 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:37:53,657 INFO L227 lantSequenceWeakener]: Weakened 265 states. On average, predicates are now at 77.79% of their original sizes. [2018-11-07 20:37:53,657 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:37:54,012 INFO L415 sIntCurrentIteration]: We unified 273 AI predicates to 273 [2018-11-07 20:37:54,020 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:37:54,021 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:37:54,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 20:37:54,021 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:54,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:37:54,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:37:54,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:37:54,022 INFO L87 Difference]: Start difference. First operand 1733 states and 2647 transitions. Second operand 7 states. [2018-11-07 20:38:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:07,652 INFO L93 Difference]: Finished difference Result 3645 states and 5568 transitions. [2018-11-07 20:38:07,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:38:07,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 274 [2018-11-07 20:38:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:07,665 INFO L225 Difference]: With dead ends: 3645 [2018-11-07 20:38:07,665 INFO L226 Difference]: Without dead ends: 1918 [2018-11-07 20:38:07,673 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 274 GetRequests, 268 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 20:38:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2018-11-07 20:38:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2018-11-07 20:38:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-07 20:38:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2838 transitions. [2018-11-07 20:38:07,733 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2838 transitions. Word has length 274 [2018-11-07 20:38:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:07,734 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2838 transitions. [2018-11-07 20:38:07,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:38:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2838 transitions. [2018-11-07 20:38:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-11-07 20:38:07,748 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:07,749 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 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] [2018-11-07 20:38:07,749 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:07,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash -111433536, now seen corresponding path program 1 times [2018-11-07 20:38:07,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:07,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:07,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:07,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:07,752 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 214 proven. 189 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:38:08,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:38:08,624 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:38:08,624 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 360 with the following transitions: [2018-11-07 20:38:08,624 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:38:08,631 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:38:08,631 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:38:08,739 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:38:08,838 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:38:08,839 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 20:38:08,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:08,878 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:38:09,745 INFO L227 lantSequenceWeakener]: Weakened 110 states. On average, predicates are now at 77.73% of their original sizes. [2018-11-07 20:38:09,745 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:38:11,072 INFO L415 sIntCurrentIteration]: We unified 358 AI predicates to 358 [2018-11-07 20:38:11,073 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:38:11,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:38:11,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 30 [2018-11-07 20:38:11,073 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:11,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:38:11,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:38:11,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:38:11,075 INFO L87 Difference]: Start difference. First operand 1916 states and 2838 transitions. Second operand 20 states. [2018-11-07 20:38:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:32,538 INFO L93 Difference]: Finished difference Result 4798 states and 6877 transitions. [2018-11-07 20:38:32,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:38:32,538 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 359 [2018-11-07 20:38:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:32,550 INFO L225 Difference]: With dead ends: 4798 [2018-11-07 20:38:32,551 INFO L226 Difference]: Without dead ends: 2286 [2018-11-07 20:38:32,561 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 368 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-11-07 20:38:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2018-11-07 20:38:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2284. [2018-11-07 20:38:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2018-11-07 20:38:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3214 transitions. [2018-11-07 20:38:32,628 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3214 transitions. Word has length 359 [2018-11-07 20:38:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:32,629 INFO L480 AbstractCegarLoop]: Abstraction has 2284 states and 3214 transitions. [2018-11-07 20:38:32,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:38:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3214 transitions. [2018-11-07 20:38:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-11-07 20:38:32,643 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:32,644 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:38:32,644 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:32,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2119199892, now seen corresponding path program 1 times [2018-11-07 20:38:32,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:32,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:32,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:32,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:32,646 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:33,813 WARN L179 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-11-07 20:38:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 139 proven. 316 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:38:34,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:38:34,289 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:38:34,289 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 386 with the following transitions: [2018-11-07 20:38:34,290 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:38:34,294 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:38:34,294 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:38:34,391 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:38:34,469 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:38:34,469 INFO L272 AbstractInterpreter]: Visited 122 different actions 240 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:38:34,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:34,473 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:38:34,896 INFO L227 lantSequenceWeakener]: Weakened 49 states. On average, predicates are now at 80.93% of their original sizes. [2018-11-07 20:38:34,897 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:38:35,442 INFO L415 sIntCurrentIteration]: We unified 384 AI predicates to 384 [2018-11-07 20:38:35,443 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:38:35,443 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:38:35,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [15] total 33 [2018-11-07 20:38:35,444 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:35,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:38:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:38:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:38:35,446 INFO L87 Difference]: Start difference. First operand 2284 states and 3214 transitions. Second operand 20 states. [2018-11-07 20:38:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:51,111 INFO L93 Difference]: Finished difference Result 4384 states and 6418 transitions. [2018-11-07 20:38:51,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 20:38:51,111 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 385 [2018-11-07 20:38:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:51,123 INFO L225 Difference]: With dead ends: 4384 [2018-11-07 20:38:51,123 INFO L226 Difference]: Without dead ends: 2657 [2018-11-07 20:38:51,132 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 400 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2018-11-07 20:38:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2018-11-07 20:38:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2652. [2018-11-07 20:38:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2018-11-07 20:38:51,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3610 transitions. [2018-11-07 20:38:51,199 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3610 transitions. Word has length 385 [2018-11-07 20:38:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:51,200 INFO L480 AbstractCegarLoop]: Abstraction has 2652 states and 3610 transitions. [2018-11-07 20:38:51,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:38:51,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3610 transitions. [2018-11-07 20:38:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-11-07 20:38:51,214 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:51,215 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:38:51,215 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:51,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1707416776, now seen corresponding path program 1 times [2018-11-07 20:38:51,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:51,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:51,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:51,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:51,217 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 242 proven. 216 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:38:52,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:38:52,061 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:38:52,061 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 396 with the following transitions: [2018-11-07 20:38:52,061 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:38:52,068 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:38:52,068 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:38:52,114 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:38:52,205 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:38:52,205 INFO L272 AbstractInterpreter]: Visited 130 different actions 253 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 20:38:52,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:52,221 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:38:52,615 INFO L227 lantSequenceWeakener]: Weakened 110 states. On average, predicates are now at 77.73% of their original sizes. [2018-11-07 20:38:52,615 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:38:53,032 INFO L415 sIntCurrentIteration]: We unified 394 AI predicates to 394 [2018-11-07 20:38:53,032 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:38:53,033 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:38:53,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 30 [2018-11-07 20:38:53,033 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:53,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:38:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:38:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:38:53,035 INFO L87 Difference]: Start difference. First operand 2652 states and 3610 transitions. Second operand 20 states. [2018-11-07 20:39:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:12,246 INFO L93 Difference]: Finished difference Result 5354 states and 7460 transitions. [2018-11-07 20:39:12,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:39:12,247 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 395 [2018-11-07 20:39:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:12,260 INFO L225 Difference]: With dead ends: 5354 [2018-11-07 20:39:12,260 INFO L226 Difference]: Without dead ends: 2842 [2018-11-07 20:39:12,269 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 404 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-11-07 20:39:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-11-07 20:39:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2654. [2018-11-07 20:39:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2018-11-07 20:39:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3611 transitions. [2018-11-07 20:39:12,332 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3611 transitions. Word has length 395 [2018-11-07 20:39:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:12,333 INFO L480 AbstractCegarLoop]: Abstraction has 2654 states and 3611 transitions. [2018-11-07 20:39:12,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:39:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3611 transitions. [2018-11-07 20:39:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-11-07 20:39:12,347 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:12,347 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:39:12,348 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:12,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:12,348 INFO L82 PathProgramCache]: Analyzing trace with hash -669910593, now seen corresponding path program 1 times [2018-11-07 20:39:12,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:12,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:12,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:12,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:12,350 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 226 proven. 232 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:39:13,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:13,650 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:13,650 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 421 with the following transitions: [2018-11-07 20:39:13,650 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [798], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:13,654 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:13,654 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:13,730 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:14,009 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:14,009 INFO L272 AbstractInterpreter]: Visited 155 different actions 303 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 20:39:14,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:14,044 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:14,882 INFO L227 lantSequenceWeakener]: Weakened 137 states. On average, predicates are now at 77.64% of their original sizes. [2018-11-07 20:39:14,882 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:16,141 INFO L415 sIntCurrentIteration]: We unified 419 AI predicates to 419 [2018-11-07 20:39:16,141 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:16,142 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:16,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [13] total 32 [2018-11-07 20:39:16,142 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:16,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 20:39:16,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 20:39:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:39:16,144 INFO L87 Difference]: Start difference. First operand 2654 states and 3611 transitions. Second operand 21 states. [2018-11-07 20:39:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:37,013 INFO L93 Difference]: Finished difference Result 5354 states and 7460 transitions. [2018-11-07 20:39:37,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-07 20:39:37,014 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 420 [2018-11-07 20:39:37,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:37,027 INFO L225 Difference]: With dead ends: 5354 [2018-11-07 20:39:37,027 INFO L226 Difference]: Without dead ends: 2842 [2018-11-07 20:39:37,035 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 428 GetRequests, 394 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2018-11-07 20:39:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-11-07 20:39:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2654. [2018-11-07 20:39:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2018-11-07 20:39:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3611 transitions. [2018-11-07 20:39:37,100 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3611 transitions. Word has length 420 [2018-11-07 20:39:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:37,100 INFO L480 AbstractCegarLoop]: Abstraction has 2654 states and 3611 transitions. [2018-11-07 20:39:37,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 20:39:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3611 transitions. [2018-11-07 20:39:37,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-11-07 20:39:37,110 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:37,111 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:39:37,111 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:37,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash 855280652, now seen corresponding path program 1 times [2018-11-07 20:39:37,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:37,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:37,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:37,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:37,113 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:37,586 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:39:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 213 proven. 245 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:39:38,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:38,190 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:38,190 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 434 with the following transitions: [2018-11-07 20:39:38,191 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [850], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:38,194 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:38,194 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:38,256 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:38,443 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:38,443 INFO L272 AbstractInterpreter]: Visited 168 different actions 329 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 20:39:38,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:38,449 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:39,488 INFO L227 lantSequenceWeakener]: Weakened 106 states. On average, predicates are now at 77.74% of their original sizes. [2018-11-07 20:39:39,488 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:40,265 INFO L415 sIntCurrentIteration]: We unified 432 AI predicates to 432 [2018-11-07 20:39:40,266 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:40,266 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:40,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [12] total 29 [2018-11-07 20:39:40,266 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:40,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 20:39:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 20:39:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2018-11-07 20:39:40,268 INFO L87 Difference]: Start difference. First operand 2654 states and 3611 transitions. Second operand 19 states. [2018-11-07 20:39:58,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:58,721 INFO L93 Difference]: Finished difference Result 5354 states and 7460 transitions. [2018-11-07 20:39:58,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-07 20:39:58,721 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 433 [2018-11-07 20:39:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:58,735 INFO L225 Difference]: With dead ends: 5354 [2018-11-07 20:39:58,736 INFO L226 Difference]: Without dead ends: 2842 [2018-11-07 20:39:58,745 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 442 GetRequests, 409 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2018-11-07 20:39:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-11-07 20:39:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2654. [2018-11-07 20:39:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2018-11-07 20:39:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3611 transitions. [2018-11-07 20:39:58,814 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3611 transitions. Word has length 433 [2018-11-07 20:39:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:58,815 INFO L480 AbstractCegarLoop]: Abstraction has 2654 states and 3611 transitions. [2018-11-07 20:39:58,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 20:39:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3611 transitions. [2018-11-07 20:39:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2018-11-07 20:39:58,825 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:58,826 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:39:58,826 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:58,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:58,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1945896396, now seen corresponding path program 1 times [2018-11-07 20:39:58,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:58,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:58,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:58,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:58,828 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:59,359 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:39:59,559 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:40:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 201 proven. 257 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:40:00,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:00,856 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:00,856 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 446 with the following transitions: [2018-11-07 20:40:00,856 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [898], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:40:00,859 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:00,859 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:00,923 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:01,069 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:40:01,069 INFO L272 AbstractInterpreter]: Visited 180 different actions 353 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 20:40:01,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:01,074 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:40:01,519 INFO L227 lantSequenceWeakener]: Weakened 110 states. On average, predicates are now at 77.73% of their original sizes. [2018-11-07 20:40:01,519 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:40:01,938 INFO L415 sIntCurrentIteration]: We unified 444 AI predicates to 444 [2018-11-07 20:40:01,938 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:40:01,939 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:40:01,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [14] total 32 [2018-11-07 20:40:01,939 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:40:01,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:40:01,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:40:01,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:40:01,940 INFO L87 Difference]: Start difference. First operand 2654 states and 3611 transitions. Second operand 20 states. [2018-11-07 20:40:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:40:19,749 INFO L93 Difference]: Finished difference Result 5352 states and 7458 transitions. [2018-11-07 20:40:19,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:40:19,749 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 445 [2018-11-07 20:40:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:40:19,760 INFO L225 Difference]: With dead ends: 5352 [2018-11-07 20:40:19,760 INFO L226 Difference]: Without dead ends: 2840 [2018-11-07 20:40:19,768 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 454 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-11-07 20:40:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2018-11-07 20:40:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2652. [2018-11-07 20:40:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2018-11-07 20:40:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3609 transitions. [2018-11-07 20:40:19,825 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3609 transitions. Word has length 445 [2018-11-07 20:40:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:40:19,825 INFO L480 AbstractCegarLoop]: Abstraction has 2652 states and 3609 transitions. [2018-11-07 20:40:19,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:40:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3609 transitions. [2018-11-07 20:40:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-11-07 20:40:19,835 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:40:19,835 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:40:19,836 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:40:19,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1869819802, now seen corresponding path program 1 times [2018-11-07 20:40:19,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:40:19,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:19,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:19,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:19,837 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:40:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 261 proven. 166 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-11-07 20:40:23,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:23,389 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:23,389 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 471 with the following transitions: [2018-11-07 20:40:23,389 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:40:23,391 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:23,391 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:23,488 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:23,677 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:40:23,677 INFO L272 AbstractInterpreter]: Visited 124 different actions 372 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 20:40:23,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:23,685 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:40:23,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:23,685 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 20:40:23,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:23,695 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:40:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:23,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:40:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 557 proven. 2 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-11-07 20:40:24,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:40:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 261 proven. 166 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-11-07 20:40:25,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:40:25,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 20:40:25,100 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:40:25,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 20:40:25,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 20:40:25,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:40:25,102 INFO L87 Difference]: Start difference. First operand 2652 states and 3609 transitions. Second operand 9 states. [2018-11-07 20:40:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:40:29,768 INFO L93 Difference]: Finished difference Result 6619 states and 9790 transitions. [2018-11-07 20:40:29,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:40:29,769 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 470 [2018-11-07 20:40:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:40:29,797 INFO L225 Difference]: With dead ends: 6619 [2018-11-07 20:40:29,797 INFO L226 Difference]: Without dead ends: 4524 [2018-11-07 20:40:29,826 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 947 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2018-11-07 20:40:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4524 states. [2018-11-07 20:40:29,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4524 to 4341. [2018-11-07 20:40:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4341 states. [2018-11-07 20:40:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4341 states to 4341 states and 6022 transitions. [2018-11-07 20:40:29,958 INFO L78 Accepts]: Start accepts. Automaton has 4341 states and 6022 transitions. Word has length 470 [2018-11-07 20:40:29,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:40:29,958 INFO L480 AbstractCegarLoop]: Abstraction has 4341 states and 6022 transitions. [2018-11-07 20:40:29,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 20:40:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4341 states and 6022 transitions. [2018-11-07 20:40:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2018-11-07 20:40:29,979 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:40:29,980 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-11-07 20:40:29,980 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:40:29,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash 819867949, now seen corresponding path program 1 times [2018-11-07 20:40:29,980 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:40:29,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:29,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:29,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:29,982 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:40:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:30,976 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:40:31,216 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:40:31,479 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:40:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 279 proven. 482 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:40:32,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:32,131 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:32,131 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 474 with the following transitions: [2018-11-07 20:40:32,131 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [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], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:40:32,133 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:32,134 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:32,335 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:32,644 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:40:32,644 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 20:40:32,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:32,680 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:40:32,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:32,680 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 20:40:32,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:32,696 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:40:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:32,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:40:33,386 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:40:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 503 proven. 135 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-07 20:40:33,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:40:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 191 proven. 485 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-07 20:40:35,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:40:35,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 23 [2018-11-07 20:40:35,290 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:40:35,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 20:40:35,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 20:40:35,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-11-07 20:40:35,291 INFO L87 Difference]: Start difference. First operand 4341 states and 6022 transitions. Second operand 18 states. [2018-11-07 20:40:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:40:42,062 INFO L93 Difference]: Finished difference Result 10353 states and 14825 transitions. [2018-11-07 20:40:42,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 20:40:42,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 473 [2018-11-07 20:40:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:40:42,089 INFO L225 Difference]: With dead ends: 10353 [2018-11-07 20:40:42,089 INFO L226 Difference]: Without dead ends: 6355 [2018-11-07 20:40:42,105 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 959 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2018-11-07 20:40:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6355 states. [2018-11-07 20:40:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6355 to 5958. [2018-11-07 20:40:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5958 states. [2018-11-07 20:40:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5958 states to 5958 states and 7856 transitions. [2018-11-07 20:40:42,243 INFO L78 Accepts]: Start accepts. Automaton has 5958 states and 7856 transitions. Word has length 473 [2018-11-07 20:40:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:40:42,243 INFO L480 AbstractCegarLoop]: Abstraction has 5958 states and 7856 transitions. [2018-11-07 20:40:42,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 20:40:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 5958 states and 7856 transitions. [2018-11-07 20:40:42,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-11-07 20:40:42,265 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:40:42,265 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:40:42,265 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:40:42,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:42,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1255475487, now seen corresponding path program 1 times [2018-11-07 20:40:42,266 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:40:42,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:42,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:42,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:42,267 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:40:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 400 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-07 20:40:42,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:42,940 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:42,940 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 496 with the following transitions: [2018-11-07 20:40:42,940 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:40:42,942 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:42,942 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:43,002 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:43,266 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:40:43,266 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 20:40:43,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:43,304 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:40:43,896 INFO L227 lantSequenceWeakener]: Weakened 492 states. On average, predicates are now at 80.33% of their original sizes. [2018-11-07 20:40:43,896 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:40:44,198 INFO L415 sIntCurrentIteration]: We unified 494 AI predicates to 494 [2018-11-07 20:40:44,198 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:40:44,198 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:40:44,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 20:40:44,199 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:40:44,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:40:44,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:40:44,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:40:44,200 INFO L87 Difference]: Start difference. First operand 5958 states and 7856 transitions. Second operand 10 states. [2018-11-07 20:40:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:40:53,585 INFO L93 Difference]: Finished difference Result 12316 states and 16515 transitions. [2018-11-07 20:40:53,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:40:53,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 495 [2018-11-07 20:40:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:40:53,608 INFO L225 Difference]: With dead ends: 12316 [2018-11-07 20:40:53,608 INFO L226 Difference]: Without dead ends: 6732 [2018-11-07 20:40:53,622 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 502 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:40:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6732 states. [2018-11-07 20:40:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6732 to 6698. [2018-11-07 20:40:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6698 states. [2018-11-07 20:40:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6698 states to 6698 states and 8728 transitions. [2018-11-07 20:40:53,753 INFO L78 Accepts]: Start accepts. Automaton has 6698 states and 8728 transitions. Word has length 495 [2018-11-07 20:40:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:40:53,754 INFO L480 AbstractCegarLoop]: Abstraction has 6698 states and 8728 transitions. [2018-11-07 20:40:53,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:40:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6698 states and 8728 transitions. [2018-11-07 20:40:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2018-11-07 20:40:53,774 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:40:53,775 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-11-07 20:40:53,775 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:40:53,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:53,775 INFO L82 PathProgramCache]: Analyzing trace with hash -124366288, now seen corresponding path program 1 times [2018-11-07 20:40:53,776 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:40:53,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:53,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:53,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:53,777 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:40:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 402 proven. 321 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 20:40:55,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:55,242 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:55,242 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 563 with the following transitions: [2018-11-07 20:40:55,242 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [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 20:40:55,245 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:55,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:55,393 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:56,328 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:40:56,329 INFO L272 AbstractInterpreter]: Visited 191 different actions 954 times. Merged at 9 different actions 47 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 20:40:56,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:56,335 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:40:56,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:56,335 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 20:40:56,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:56,345 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:40:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:56,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:40:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 680 proven. 2 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-11-07 20:40:56,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:40:57,063 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-07 20:40:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 400 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-07 20:40:57,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:40:57,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-07 20:40:57,629 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:40:57,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 20:40:57,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 20:40:57,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:40:57,633 INFO L87 Difference]: Start difference. First operand 6698 states and 8728 transitions. Second operand 17 states. [2018-11-07 20:41:00,588 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-07 20:41:00,942 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2018-11-07 20:41:01,265 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-07 20:41:01,832 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2018-11-07 20:41:02,189 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2018-11-07 20:41:02,475 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2018-11-07 20:41:03,107 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-07 20:41:05,391 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2018-11-07 20:41:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:41:09,058 INFO L93 Difference]: Finished difference Result 13849 states and 18855 transitions. [2018-11-07 20:41:09,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-07 20:41:09,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 562 [2018-11-07 20:41:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:41:09,088 INFO L225 Difference]: With dead ends: 13849 [2018-11-07 20:41:09,088 INFO L226 Difference]: Without dead ends: 7525 [2018-11-07 20:41:09,109 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1157 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 20:41:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7525 states. [2018-11-07 20:41:09,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7525 to 7404. [2018-11-07 20:41:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7404 states. [2018-11-07 20:41:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7404 states to 7404 states and 9314 transitions. [2018-11-07 20:41:09,278 INFO L78 Accepts]: Start accepts. Automaton has 7404 states and 9314 transitions. Word has length 562 [2018-11-07 20:41:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:41:09,279 INFO L480 AbstractCegarLoop]: Abstraction has 7404 states and 9314 transitions. [2018-11-07 20:41:09,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 20:41:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7404 states and 9314 transitions. [2018-11-07 20:41:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-11-07 20:41:09,295 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:41:09,296 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:41:09,296 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:41:09,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:09,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1869135889, now seen corresponding path program 1 times [2018-11-07 20:41:09,297 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:41:09,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:09,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:41:09,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:09,298 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:41:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:41:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 541 proven. 481 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-11-07 20:41:10,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:41:10,567 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:41:10,568 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 581 with the following transitions: [2018-11-07 20:41:10,568 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:41:10,570 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:41:10,571 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:41:10,628 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:41:11,000 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:41:11,000 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 20:41:11,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:11,009 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:41:11,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:41:11,009 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 20:41:11,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:41:11,017 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:41:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:41:11,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:41:11,593 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:41:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 895 proven. 2 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-11-07 20:41:12,183 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:41:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 535 proven. 111 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-11-07 20:41:12,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:41:12,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 14 [2018-11-07 20:41:12,809 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:41:12,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 20:41:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 20:41:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-07 20:41:12,812 INFO L87 Difference]: Start difference. First operand 7404 states and 9314 transitions. Second operand 13 states. [2018-11-07 20:41:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:41:15,850 INFO L93 Difference]: Finished difference Result 14204 states and 18945 transitions. [2018-11-07 20:41:15,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 20:41:15,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 580 [2018-11-07 20:41:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:41:15,880 INFO L225 Difference]: With dead ends: 14204 [2018-11-07 20:41:15,880 INFO L226 Difference]: Without dead ends: 6930 [2018-11-07 20:41:15,900 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 1167 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2018-11-07 20:41:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6930 states. [2018-11-07 20:41:16,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6930 to 6771. [2018-11-07 20:41:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6771 states. [2018-11-07 20:41:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6771 states to 6771 states and 8382 transitions. [2018-11-07 20:41:16,055 INFO L78 Accepts]: Start accepts. Automaton has 6771 states and 8382 transitions. Word has length 580 [2018-11-07 20:41:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:41:16,056 INFO L480 AbstractCegarLoop]: Abstraction has 6771 states and 8382 transitions. [2018-11-07 20:41:16,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 20:41:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 6771 states and 8382 transitions. [2018-11-07 20:41:16,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2018-11-07 20:41:16,068 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:41:16,069 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2018-11-07 20:41:16,069 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:41:16,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:16,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1885549233, now seen corresponding path program 1 times [2018-11-07 20:41:16,070 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:41:16,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:16,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:41:16,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:16,071 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:41:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:41:16,770 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 Received shutdown request... [2018-11-07 20:41:17,002 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:41:17,007 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:41:17,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:41:17 BoogieIcfgContainer [2018-11-07 20:41:17,008 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:41:17,009 INFO L168 Benchmark]: Toolchain (without parser) took 219685.05 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-07 20:41:17,010 INFO L168 Benchmark]: CDTParser took 0.19 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 20:41:17,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 780.12 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 20:41:17,014 INFO L168 Benchmark]: Boogie Procedure Inliner took 147.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -850.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2018-11-07 20:41:17,015 INFO L168 Benchmark]: Boogie Preprocessor took 123.42 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: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2018-11-07 20:41:17,022 INFO L168 Benchmark]: RCFGBuilder took 3671.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.5 MB). Peak memory consumption was 130.5 MB. Max. memory is 7.1 GB. [2018-11-07 20:41:17,023 INFO L168 Benchmark]: TraceAbstraction took 214954.90 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -459.3 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-11-07 20:41:17,038 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 780.12 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 147.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -850.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.42 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: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3671.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 130.5 MB). Peak memory consumption was 130.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214954.90 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -459.3 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 130]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 130). Cancelled while BasicCegarLoop was analyzing trace of length 629 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 7 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 214.8s OverallTime, 16 OverallIterations, 6 TraceHistogramMax, 170.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2652 SDtfs, 39754 SDslu, 3568 SDs, 0 SdLazy, 41810 SolverSat, 5470 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.3s Time, PredicateUnifierStatistics: 16 DeclaredPredicates, 7684 GetRequests, 7302 SyntacticMatches, 24 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3262 ImplicationChecksByTransitivity, 17.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7404occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.0s AbstIntTime, 12 AbstIntIterations, 8 AbstIntStrong, 0.9975184643390813 AbsIntWeakeningRatio, 0.08005003126954346 AbsIntAvgWeakeningVarsNumRemoved, 14.85428392745466 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 1664 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 16.1s InterpolantComputationTime, 7706 NumberOfCodeBlocks, 7706 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 9768 ConstructedInterpolants, 0 QuantifiedInterpolants, 32877331 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3160 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 10402/14539 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown