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/Problem11_label46_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:13:08,330 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:13:08,332 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:13:08,344 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:13:08,345 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:13:08,346 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:13:08,347 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:13:08,349 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:13:08,351 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:13:08,351 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:13:08,352 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:13:08,353 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:13:08,354 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:13:08,355 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:13:08,356 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:13:08,357 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:13:08,358 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:13:08,360 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:13:08,363 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:13:08,370 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:13:08,372 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:13:08,374 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:13:08,376 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:13:08,376 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:13:08,376 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:13:08,377 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:13:08,378 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:13:08,379 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:13:08,379 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:13:08,380 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:13:08,381 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:13:08,381 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:13:08,381 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:13:08,382 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:13:08,383 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:13:08,383 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:13:08,383 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 20:13:08,398 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:13:08,399 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:13:08,399 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:13:08,400 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:13:08,400 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:13:08,400 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:13:08,400 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:13:08,400 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:13:08,401 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:13:08,401 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:13:08,401 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:13:08,401 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:13:08,401 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:13:08,402 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:13:08,402 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:13:08,402 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:13:08,403 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:13:08,403 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:13:08,403 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:13:08,403 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:13:08,403 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:13:08,404 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:13:08,404 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:13:08,404 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:13:08,404 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:13:08,404 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:13:08,404 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:13:08,405 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:13:08,405 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:13:08,405 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:13:08,405 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:13:08,405 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:13:08,406 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:13:08,406 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:13:08,406 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:13:08,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:13:08,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:13:08,469 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:13:08,471 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:13:08,471 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:13:08,472 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label46_true-unreach-call.c [2018-11-07 20:13:08,530 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9206f01/94ac5dc7562e412f925a557096b1d8f1/FLAG10f532f44 [2018-11-07 20:13:09,139 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:13:09,145 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label46_true-unreach-call.c [2018-11-07 20:13:09,159 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9206f01/94ac5dc7562e412f925a557096b1d8f1/FLAG10f532f44 [2018-11-07 20:13:09,175 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a9206f01/94ac5dc7562e412f925a557096b1d8f1 [2018-11-07 20:13:09,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:13:09,188 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:13:09,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:13:09,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:13:09,194 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:13:09,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:13:09" (1/1) ... [2018-11-07 20:13:09,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ede70b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:09, skipping insertion in model container [2018-11-07 20:13:09,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:13:09" (1/1) ... [2018-11-07 20:13:09,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:13:09,276 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:13:09,932 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:13:09,938 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:13:10,131 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:13:10,151 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:13:10,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10 WrapperNode [2018-11-07 20:13:10,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:13:10,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:13:10,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:13:10,153 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:13:10,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (1/1) ... [2018-11-07 20:13:10,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (1/1) ... [2018-11-07 20:13:10,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:13:10,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:13:10,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:13:10,320 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:13:10,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (1/1) ... [2018-11-07 20:13:10,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (1/1) ... [2018-11-07 20:13:10,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (1/1) ... [2018-11-07 20:13:10,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (1/1) ... [2018-11-07 20:13:10,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (1/1) ... [2018-11-07 20:13:10,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (1/1) ... [2018-11-07 20:13:10,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (1/1) ... [2018-11-07 20:13:10,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:13:10,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:13:10,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:13:10,454 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:13:10,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (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 20:13:10,529 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:13:10,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:13:10,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:13:10,530 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:13:10,530 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:13:10,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:13:10,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:13:10,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:13:10,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:13:15,007 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:13:15,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:13:15 BoogieIcfgContainer [2018-11-07 20:13:15,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:13:15,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:13:15,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:13:15,013 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:13:15,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:13:09" (1/3) ... [2018-11-07 20:13:15,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2ba40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:13:15, skipping insertion in model container [2018-11-07 20:13:15,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:10" (2/3) ... [2018-11-07 20:13:15,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2ba40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:13:15, skipping insertion in model container [2018-11-07 20:13:15,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:13:15" (3/3) ... [2018-11-07 20:13:15,017 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label46_true-unreach-call.c [2018-11-07 20:13:15,028 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:13:15,037 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:13:15,053 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:13:15,094 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:13:15,094 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:13:15,094 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:13:15,094 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:13:15,095 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:13:15,095 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:13:15,095 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:13:15,095 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:13:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 20:13:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-07 20:13:15,144 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:15,145 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:15,149 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:15,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash 992823241, now seen corresponding path program 1 times [2018-11-07 20:13:15,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:15,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:15,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:15,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:15,207 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:15,725 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:13:15,847 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 20:13:15,850 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:13:15,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 20:13:15,851 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:15,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:13:15,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:13:15,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:13:15,877 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-11-07 20:13:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:18,439 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-11-07 20:13:18,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:13:18,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2018-11-07 20:13:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:18,464 INFO L225 Difference]: With dead ends: 782 [2018-11-07 20:13:18,464 INFO L226 Difference]: Without dead ends: 487 [2018-11-07 20:13:18,473 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:13:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-11-07 20:13:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-11-07 20:13:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-11-07 20:13:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-11-07 20:13:18,560 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 69 [2018-11-07 20:13:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:18,561 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-11-07 20:13:18,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:13:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-11-07 20:13:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-07 20:13:18,571 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:18,572 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, 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] [2018-11-07 20:13:18,572 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:18,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:18,573 INFO L82 PathProgramCache]: Analyzing trace with hash 742048031, now seen corresponding path program 1 times [2018-11-07 20:13:18,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:18,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:18,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:18,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:18,575 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:13:19,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:13:19,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 20:13:19,082 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:19,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:13:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:13:19,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:13:19,085 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-11-07 20:13:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:24,686 INFO L93 Difference]: Finished difference Result 1759 states and 3238 transitions. [2018-11-07 20:13:24,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 20:13:24,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2018-11-07 20:13:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:24,708 INFO L225 Difference]: With dead ends: 1759 [2018-11-07 20:13:24,708 INFO L226 Difference]: Without dead ends: 1283 [2018-11-07 20:13:24,715 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-07 20:13:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2018-11-07 20:13:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1037. [2018-11-07 20:13:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-11-07 20:13:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1685 transitions. [2018-11-07 20:13:24,817 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1685 transitions. Word has length 144 [2018-11-07 20:13:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:24,820 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 1685 transitions. [2018-11-07 20:13:24,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:13:24,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1685 transitions. [2018-11-07 20:13:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-07 20:13:24,833 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:24,834 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:24,834 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:24,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:24,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1965616979, now seen corresponding path program 1 times [2018-11-07 20:13:24,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:24,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:24,836 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 124 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:13:25,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:13:25,167 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:13:25,168 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-07 20:13:25,170 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], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [514], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:13:25,216 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:13:25,216 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:13:25,653 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:13:25,655 INFO L272 AbstractInterpreter]: Visited 80 different actions 80 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-11-07 20:13:25,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:25,673 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:13:26,277 INFO L227 lantSequenceWeakener]: Weakened 208 states. On average, predicates are now at 73.88% of their original sizes. [2018-11-07 20:13:26,277 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:13:26,631 INFO L415 sIntCurrentIteration]: We unified 216 AI predicates to 216 [2018-11-07 20:13:26,632 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:13:26,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:13:26,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 20:13:26,633 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:26,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:13:26,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:13:26,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:13:26,634 INFO L87 Difference]: Start difference. First operand 1037 states and 1685 transitions. Second operand 7 states. [2018-11-07 20:13:30,120 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:13:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:46,108 INFO L93 Difference]: Finished difference Result 2260 states and 3574 transitions. [2018-11-07 20:13:46,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:13:46,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2018-11-07 20:13:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:46,116 INFO L225 Difference]: With dead ends: 2260 [2018-11-07 20:13:46,117 INFO L226 Difference]: Without dead ends: 1229 [2018-11-07 20:13:46,120 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 217 GetRequests, 211 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 20:13:46,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2018-11-07 20:13:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1227. [2018-11-07 20:13:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2018-11-07 20:13:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1883 transitions. [2018-11-07 20:13:46,156 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1883 transitions. Word has length 217 [2018-11-07 20:13:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:46,157 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 1883 transitions. [2018-11-07 20:13:46,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:13:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1883 transitions. [2018-11-07 20:13:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-07 20:13:46,163 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:46,163 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:13:46,164 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:46,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash -645920121, now seen corresponding path program 1 times [2018-11-07 20:13:46,164 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:46,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:46,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:46,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:46,166 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-07 20:13:47,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:13:47,316 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:13:47,317 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 262 with the following transitions: [2018-11-07 20:13:47,317 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], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:13:47,323 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:13:47,323 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:13:47,435 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:13:47,586 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:13:47,587 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:13:47,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:47,598 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:13:47,960 INFO L227 lantSequenceWeakener]: Weakened 258 states. On average, predicates are now at 73.77% of their original sizes. [2018-11-07 20:13:47,961 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:13:48,483 INFO L415 sIntCurrentIteration]: We unified 260 AI predicates to 260 [2018-11-07 20:13:48,483 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:13:48,483 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:13:48,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 20:13:48,484 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:48,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:13:48,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:13:48,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:13:48,486 INFO L87 Difference]: Start difference. First operand 1227 states and 1883 transitions. Second operand 11 states. [2018-11-07 20:14:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:02,710 INFO L93 Difference]: Finished difference Result 2453 states and 3929 transitions. [2018-11-07 20:14:02,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:14:02,710 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 261 [2018-11-07 20:14:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:02,719 INFO L225 Difference]: With dead ends: 2453 [2018-11-07 20:14:02,719 INFO L226 Difference]: Without dead ends: 1422 [2018-11-07 20:14:02,724 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 269 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:14:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2018-11-07 20:14:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1418. [2018-11-07 20:14:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2018-11-07 20:14:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2090 transitions. [2018-11-07 20:14:02,768 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2090 transitions. Word has length 261 [2018-11-07 20:14:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:02,769 INFO L480 AbstractCegarLoop]: Abstraction has 1418 states and 2090 transitions. [2018-11-07 20:14:02,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:14:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2090 transitions. [2018-11-07 20:14:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-11-07 20:14:02,776 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:02,776 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:02,776 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:02,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1266277691, now seen corresponding path program 1 times [2018-11-07 20:14:02,777 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:02,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:02,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:02,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:02,779 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:14:03,084 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:14:03,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:14:03,084 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:14:03,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:14:03,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:14:03,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:14:03,086 INFO L87 Difference]: Start difference. First operand 1418 states and 2090 transitions. Second operand 4 states. [2018-11-07 20:14:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:05,460 INFO L93 Difference]: Finished difference Result 3943 states and 6559 transitions. [2018-11-07 20:14:05,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:14:05,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 271 [2018-11-07 20:14:05,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:05,478 INFO L225 Difference]: With dead ends: 3943 [2018-11-07 20:14:05,478 INFO L226 Difference]: Without dead ends: 2912 [2018-11-07 20:14:05,487 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 20:14:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2018-11-07 20:14:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2896. [2018-11-07 20:14:05,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2896 states. [2018-11-07 20:14:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4414 transitions. [2018-11-07 20:14:05,566 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4414 transitions. Word has length 271 [2018-11-07 20:14:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:05,567 INFO L480 AbstractCegarLoop]: Abstraction has 2896 states and 4414 transitions. [2018-11-07 20:14:05,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:14:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4414 transitions. [2018-11-07 20:14:05,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-11-07 20:14:05,577 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:05,578 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:05,578 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:05,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:05,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1291753869, now seen corresponding path program 1 times [2018-11-07 20:14:05,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:05,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:05,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:05,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:05,580 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:14:05,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:05,901 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:05,902 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 288 with the following transitions: [2018-11-07 20:14:05,902 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], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [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], [578], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:05,907 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:05,908 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:06,021 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:06,272 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:14:06,272 INFO L272 AbstractInterpreter]: Visited 135 different actions 392 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:14:06,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:06,278 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:14:06,600 INFO L227 lantSequenceWeakener]: Weakened 284 states. On average, predicates are now at 73.7% of their original sizes. [2018-11-07 20:14:06,601 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:14:06,730 INFO L415 sIntCurrentIteration]: We unified 286 AI predicates to 286 [2018-11-07 20:14:06,731 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:14:06,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:14:06,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 20:14:06,731 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:14:06,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:14:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:14:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:14:06,733 INFO L87 Difference]: Start difference. First operand 2896 states and 4414 transitions. Second operand 11 states. [2018-11-07 20:14:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:15,883 INFO L93 Difference]: Finished difference Result 5796 states and 9172 transitions. [2018-11-07 20:14:15,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:14:15,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 287 [2018-11-07 20:14:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:15,900 INFO L225 Difference]: With dead ends: 5796 [2018-11-07 20:14:15,901 INFO L226 Difference]: Without dead ends: 3287 [2018-11-07 20:14:15,914 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 296 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:14:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2018-11-07 20:14:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 3281. [2018-11-07 20:14:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3281 states. [2018-11-07 20:14:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3281 states to 3281 states and 4855 transitions. [2018-11-07 20:14:15,994 INFO L78 Accepts]: Start accepts. Automaton has 3281 states and 4855 transitions. Word has length 287 [2018-11-07 20:14:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:15,995 INFO L480 AbstractCegarLoop]: Abstraction has 3281 states and 4855 transitions. [2018-11-07 20:14:15,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:14:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3281 states and 4855 transitions. [2018-11-07 20:14:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-11-07 20:14:16,006 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:16,006 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:16,006 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:16,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2092355643, now seen corresponding path program 1 times [2018-11-07 20:14:16,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:16,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:16,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:16,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:16,009 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 129 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-07 20:14:16,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:16,500 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:16,500 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 293 with the following transitions: [2018-11-07 20:14:16,500 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], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [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], [578], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:16,506 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:16,506 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:16,605 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:18,204 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:14:18,205 INFO L272 AbstractInterpreter]: Visited 141 different actions 830 times. Merged at 7 different actions 41 times. Widened at 1 different actions 2 times. Found 6 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:14:18,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:18,214 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:14:18,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:18,214 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 20:14:18,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:18,224 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:14:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:18,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:14:18,722 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-11-07 20:14:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:14:18,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:14:19,160 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:14:19,337 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:14:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:14:20,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:14:20,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2018-11-07 20:14:20,033 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:14:20,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:14:20,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:14:20,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-07 20:14:20,034 INFO L87 Difference]: Start difference. First operand 3281 states and 4855 transitions. Second operand 11 states. [2018-11-07 20:14:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:36,445 INFO L93 Difference]: Finished difference Result 21421 states and 38479 transitions. [2018-11-07 20:14:36,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-07 20:14:36,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 292 [2018-11-07 20:14:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:36,609 INFO L225 Difference]: With dead ends: 21421 [2018-11-07 20:14:36,609 INFO L226 Difference]: Without dead ends: 18526 [2018-11-07 20:14:36,696 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 609 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=946, Invalid=4024, Unknown=0, NotChecked=0, Total=4970 [2018-11-07 20:14:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18526 states. [2018-11-07 20:14:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18526 to 17791. [2018-11-07 20:14:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17791 states. [2018-11-07 20:14:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17791 states to 17791 states and 27680 transitions. [2018-11-07 20:14:37,440 INFO L78 Accepts]: Start accepts. Automaton has 17791 states and 27680 transitions. Word has length 292 [2018-11-07 20:14:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:37,440 INFO L480 AbstractCegarLoop]: Abstraction has 17791 states and 27680 transitions. [2018-11-07 20:14:37,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:14:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 17791 states and 27680 transitions. [2018-11-07 20:14:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-11-07 20:14:37,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:37,482 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:37,482 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:37,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash 625405564, now seen corresponding path program 1 times [2018-11-07 20:14:37,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:37,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:37,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:37,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:37,484 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:38,383 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 20:14:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-07 20:14:38,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:38,885 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:38,886 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 302 with the following transitions: [2018-11-07 20:14:38,886 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], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [614], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:38,900 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:38,901 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:39,040 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:39,676 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:14:39,676 INFO L272 AbstractInterpreter]: Visited 140 different actions 407 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:14:39,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:39,714 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:14:40,286 INFO L227 lantSequenceWeakener]: Weakened 298 states. On average, predicates are now at 73.71% of their original sizes. [2018-11-07 20:14:40,286 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:14:41,652 INFO L415 sIntCurrentIteration]: We unified 300 AI predicates to 300 [2018-11-07 20:14:41,652 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:14:41,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:14:41,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2018-11-07 20:14:41,653 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:14:41,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 20:14:41,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 20:14:41,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-07 20:14:41,658 INFO L87 Difference]: Start difference. First operand 17791 states and 27680 transitions. Second operand 13 states. [2018-11-07 20:14:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:57,915 INFO L93 Difference]: Finished difference Result 34639 states and 54396 transitions. [2018-11-07 20:14:57,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:14:57,915 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 301 [2018-11-07 20:14:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:58,019 INFO L225 Difference]: With dead ends: 34639 [2018-11-07 20:14:58,020 INFO L226 Difference]: Without dead ends: 17997 [2018-11-07 20:14:58,101 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 310 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-07 20:14:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17997 states. [2018-11-07 20:14:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17997 to 17991. [2018-11-07 20:14:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17991 states. [2018-11-07 20:14:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17991 states to 17991 states and 27887 transitions. [2018-11-07 20:14:58,682 INFO L78 Accepts]: Start accepts. Automaton has 17991 states and 27887 transitions. Word has length 301 [2018-11-07 20:14:58,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:58,683 INFO L480 AbstractCegarLoop]: Abstraction has 17991 states and 27887 transitions. [2018-11-07 20:14:58,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 20:14:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 17991 states and 27887 transitions. [2018-11-07 20:14:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-11-07 20:14:58,731 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:58,732 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:58,732 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:58,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:58,732 INFO L82 PathProgramCache]: Analyzing trace with hash -377511023, now seen corresponding path program 1 times [2018-11-07 20:14:58,733 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:58,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:58,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:58,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:58,734 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:14:59,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:59,343 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:59,343 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 318 with the following transitions: [2018-11-07 20:14:59,343 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], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [614], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:59,347 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:59,347 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:59,577 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:15:00,729 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:15:00,729 INFO L272 AbstractInterpreter]: Visited 156 different actions 455 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:15:00,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:00,736 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:15:01,506 INFO L227 lantSequenceWeakener]: Weakened 41 states. On average, predicates are now at 73.36% of their original sizes. [2018-11-07 20:15:01,506 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:15:01,790 INFO L415 sIntCurrentIteration]: We unified 316 AI predicates to 316 [2018-11-07 20:15:01,790 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:15:01,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:15:01,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [6] total 19 [2018-11-07 20:15:01,790 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:15:01,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 20:15:01,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 20:15:01,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-11-07 20:15:01,792 INFO L87 Difference]: Start difference. First operand 17991 states and 27887 transitions. Second operand 15 states. [2018-11-07 20:15:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:15:30,200 INFO L93 Difference]: Finished difference Result 35992 states and 56505 transitions. [2018-11-07 20:15:30,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-07 20:15:30,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 317 [2018-11-07 20:15:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:15:30,291 INFO L225 Difference]: With dead ends: 35992 [2018-11-07 20:15:30,291 INFO L226 Difference]: Without dead ends: 19159 [2018-11-07 20:15:30,374 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 326 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2018-11-07 20:15:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19159 states. [2018-11-07 20:15:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19159 to 19147. [2018-11-07 20:15:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19147 states. [2018-11-07 20:15:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19147 states to 19147 states and 29167 transitions. [2018-11-07 20:15:30,869 INFO L78 Accepts]: Start accepts. Automaton has 19147 states and 29167 transitions. Word has length 317 [2018-11-07 20:15:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:15:30,870 INFO L480 AbstractCegarLoop]: Abstraction has 19147 states and 29167 transitions. [2018-11-07 20:15:30,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 20:15:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 19147 states and 29167 transitions. [2018-11-07 20:15:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-11-07 20:15:30,934 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:15:30,935 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:15:30,935 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:15:30,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:30,936 INFO L82 PathProgramCache]: Analyzing trace with hash 308886860, now seen corresponding path program 1 times [2018-11-07 20:15:30,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:15:30,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:30,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:15:30,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:30,937 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:15:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:15:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 255 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:15:31,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:15:31,877 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:15:31,878 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 362 with the following transitions: [2018-11-07 20:15:31,878 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], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [846], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:15:31,881 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:15:31,881 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:15:31,993 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:15:33,338 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:15:33,338 INFO L272 AbstractInterpreter]: Visited 157 different actions 767 times. Merged at 7 different actions 28 times. Never widened. Found 5 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 20:15:33,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:33,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:15:33,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:15:33,348 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 20:15:33,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:15:33,358 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:15:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:15:33,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:15:37,398 WARN L179 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2018-11-07 20:15:39,376 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 7 [2018-11-07 20:15:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:15:39,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:15:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:15:40,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:15:40,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 20 [2018-11-07 20:15:40,342 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:15:40,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 20:15:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 20:15:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=302, Unknown=1, NotChecked=0, Total=380 [2018-11-07 20:15:40,344 INFO L87 Difference]: Start difference. First operand 19147 states and 29167 transitions. Second operand 18 states. [2018-11-07 20:15:41,592 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-11-07 20:15:43,625 WARN L179 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2018-11-07 20:15:48,937 WARN L179 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2018-11-07 20:15:51,104 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2018-11-07 20:15:59,676 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2018-11-07 20:16:01,330 WARN L179 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2018-11-07 20:16:04,784 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2018-11-07 20:16:19,608 WARN L179 SmtUtils]: Spent 8.90 s on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-11-07 20:16:21,148 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2018-11-07 20:16:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:16:26,507 INFO L93 Difference]: Finished difference Result 62224 states and 120791 transitions. [2018-11-07 20:16:26,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-11-07 20:16:26,508 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 361 [2018-11-07 20:16:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:16:26,795 INFO L225 Difference]: With dead ends: 62224 [2018-11-07 20:16:26,796 INFO L226 Difference]: Without dead ends: 37958 [2018-11-07 20:16:27,123 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 733 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=2239, Invalid=8888, Unknown=3, NotChecked=0, Total=11130 [2018-11-07 20:16:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37958 states. [2018-11-07 20:16:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37958 to 36230. [2018-11-07 20:16:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36230 states. [2018-11-07 20:16:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36230 states to 36230 states and 51579 transitions. [2018-11-07 20:16:28,417 INFO L78 Accepts]: Start accepts. Automaton has 36230 states and 51579 transitions. Word has length 361 [2018-11-07 20:16:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:16:28,417 INFO L480 AbstractCegarLoop]: Abstraction has 36230 states and 51579 transitions. [2018-11-07 20:16:28,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 20:16:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 36230 states and 51579 transitions. [2018-11-07 20:16:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-11-07 20:16:28,451 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:16:28,452 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:16:28,452 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:16:28,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:16:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1205876074, now seen corresponding path program 1 times [2018-11-07 20:16:28,452 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:16:28,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:16:28,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:16:28,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:16:28,454 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:16:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:16:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 367 proven. 82 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 20:16:28,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:16:28,810 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:16:28,810 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 372 with the following transitions: [2018-11-07 20:16:28,810 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], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [614], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:16:28,813 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:16:28,813 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:16:28,939 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:16:29,305 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:16:29,305 INFO L272 AbstractInterpreter]: Visited 127 different actions 499 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:16:29,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:16:29,313 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:16:29,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:16:29,313 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 20:16:29,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:16:29,323 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:16:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:16:29,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:16:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:16:29,541 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:16:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:16:30,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:16:30,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-07 20:16:30,084 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:16:30,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:16:30,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:16:30,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:16:30,085 INFO L87 Difference]: Start difference. First operand 36230 states and 51579 transitions. Second operand 6 states. [2018-11-07 20:16:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:16:31,996 INFO L93 Difference]: Finished difference Result 73987 states and 113127 transitions. [2018-11-07 20:16:31,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:16:31,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 371 [2018-11-07 20:16:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:16:32,224 INFO L225 Difference]: With dead ends: 73987 [2018-11-07 20:16:32,225 INFO L226 Difference]: Without dead ends: 40449 [2018-11-07 20:16:32,395 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 743 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:16:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40449 states. [2018-11-07 20:16:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40449 to 37624. [2018-11-07 20:16:33,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37624 states. [2018-11-07 20:16:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37624 states to 37624 states and 47402 transitions. [2018-11-07 20:16:33,290 INFO L78 Accepts]: Start accepts. Automaton has 37624 states and 47402 transitions. Word has length 371 [2018-11-07 20:16:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:16:33,297 INFO L480 AbstractCegarLoop]: Abstraction has 37624 states and 47402 transitions. [2018-11-07 20:16:33,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:16:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 37624 states and 47402 transitions. [2018-11-07 20:16:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-11-07 20:16:33,353 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:16:33,354 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2018-11-07 20:16:33,354 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:16:33,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:16:33,355 INFO L82 PathProgramCache]: Analyzing trace with hash -479956902, now seen corresponding path program 1 times [2018-11-07 20:16:33,355 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:16:33,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:16:33,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:16:33,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:16:33,356 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:16:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:16:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 374 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 20:16:34,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:16:34,046 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:16:34,046 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 384 with the following transitions: [2018-11-07 20:16:34,046 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], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [614], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:16:34,049 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:16:34,049 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:16:34,170 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:16:35,250 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:16:35,250 INFO L272 AbstractInterpreter]: Visited 137 different actions 678 times. Merged at 8 different actions 41 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:16:35,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:16:35,255 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:16:35,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:16:35,255 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 20:16:35,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:16:35,265 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:16:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:16:35,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:16:35,605 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2018-11-07 20:16:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-11-07 20:16:37,604 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:16:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-11-07 20:16:38,081 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:16:38,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-07 20:16:38,082 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:16:38,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:16:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:16:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:16:38,083 INFO L87 Difference]: Start difference. First operand 37624 states and 47402 transitions. Second operand 3 states. [2018-11-07 20:16:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:16:40,707 INFO L93 Difference]: Finished difference Result 74981 states and 96218 transitions. [2018-11-07 20:16:40,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:16:40,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 383 [2018-11-07 20:16:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:16:40,854 INFO L225 Difference]: With dead ends: 74981 [2018-11-07 20:16:40,854 INFO L226 Difference]: Without dead ends: 40048 [2018-11-07 20:16:41,024 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 765 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:16:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40048 states. Received shutdown request... [2018-11-07 20:16:41,410 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:16:41,415 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:16:41,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:16:41 BoogieIcfgContainer [2018-11-07 20:16:41,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:16:41,416 INFO L168 Benchmark]: Toolchain (without parser) took 212228.97 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-11-07 20:16:41,417 INFO L168 Benchmark]: CDTParser took 0.22 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 20:16:41,418 INFO L168 Benchmark]: CACSL2BoogieTranslator took 963.00 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-11-07 20:16:41,419 INFO L168 Benchmark]: Boogie Procedure Inliner took 166.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -856.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2018-11-07 20:16:41,422 INFO L168 Benchmark]: Boogie Preprocessor took 133.65 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:16:41,423 INFO L168 Benchmark]: RCFGBuilder took 4554.84 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 183.8 MB). Peak memory consumption was 183.8 MB. Max. memory is 7.1 GB. [2018-11-07 20:16:41,423 INFO L168 Benchmark]: TraceAbstraction took 206405.95 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-07 20:16:41,428 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 963.00 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 166.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -856.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.65 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4554.84 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 183.8 MB). Peak memory consumption was 183.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206405.95 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 192]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 192). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 206.3s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 167.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3199 SDtfs, 18836 SDslu, 4092 SDs, 0 SdLazy, 37179 SolverSat, 7567 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 74.2s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 4487 GetRequests, 4189 SyntacticMatches, 11 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6232 ImplicationChecksByTransitivity, 32.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37624occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 8.2s AbstIntTime, 9 AbstIntIterations, 5 AbstIntStrong, 0.997835657193423 AbsIntWeakeningRatio, 0.102322206095791 AbsIntAvgWeakeningVarsNumRemoved, 22.209724238026126 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.8s AutomataMinimizationTime, 12 MinimizatonAttempts, 5585 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 17.4s InterpolantComputationTime, 4681 NumberOfCodeBlocks, 4681 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 6068 ConstructedInterpolants, 72 QuantifiedInterpolants, 9318837 SizeOfPredicates, 4 NumberOfNonLiveVariables, 2326 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5005/5527 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown