java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:55:18,326 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:55:18,330 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:55:18,346 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:55:18,346 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:55:18,347 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:55:18,349 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:55:18,352 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:55:18,357 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:55:18,358 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:55:18,359 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:55:18,359 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:55:18,360 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:55:18,361 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:55:18,362 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:55:18,363 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:55:18,364 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:55:18,366 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:55:18,367 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:55:18,369 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:55:18,370 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:55:18,371 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:55:18,373 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:55:18,373 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:55:18,374 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:55:18,375 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:55:18,375 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:55:18,376 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:55:18,377 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:55:18,378 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:55:18,378 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:55:18,379 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 14:55:18,379 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:55:18,379 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:55:18,380 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:55:18,381 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:55:18,381 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:55:18,397 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:55:18,397 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:55:18,398 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:55:18,398 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:55:18,398 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:55:18,399 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:55:18,399 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:55:18,399 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:55:18,399 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:55:18,399 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:55:18,400 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:55:18,400 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:55:18,401 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:55:18,401 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:55:18,401 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:55:18,401 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:55:18,401 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:55:18,402 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:55:18,402 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:55:18,402 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:55:18,402 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:55:18,403 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:55:18,403 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:55:18,403 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:55:18,403 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:55:18,403 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:55:18,404 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:55:18,404 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:55:18,404 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:55:18,404 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:55:18,404 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:55:18,405 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:55:18,405 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:55:18,405 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:55:18,449 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:55:18,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:55:18,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:55:18,469 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:55:18,469 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:55:18,470 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-10-27 14:55:18,534 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b155bf2a5/3948155fedd346f9bb13a55d6e60b179/FLAGbed2cde33 [2018-10-27 14:55:19,283 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:55:19,285 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-10-27 14:55:19,313 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b155bf2a5/3948155fedd346f9bb13a55d6e60b179/FLAGbed2cde33 [2018-10-27 14:55:19,334 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b155bf2a5/3948155fedd346f9bb13a55d6e60b179 [2018-10-27 14:55:19,348 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:55:19,350 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:55:19,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:55:19,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:55:19,360 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:55:19,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:55:19" (1/1) ... [2018-10-27 14:55:19,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@708368ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:19, skipping insertion in model container [2018-10-27 14:55:19,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:55:19" (1/1) ... [2018-10-27 14:55:19,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:55:19,516 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:55:20,625 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:55:20,630 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:55:21,016 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:55:21,041 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:55:21,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21 WrapperNode [2018-10-27 14:55:21,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:55:21,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:55:21,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:55:21,043 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:55:21,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... [2018-10-27 14:55:21,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... [2018-10-27 14:55:21,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:55:21,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:55:21,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:55:21,524 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:55:21,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... [2018-10-27 14:55:21,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... [2018-10-27 14:55:21,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... [2018-10-27 14:55:21,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... [2018-10-27 14:55:21,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... [2018-10-27 14:55:21,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... [2018-10-27 14:55:21,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... [2018-10-27 14:55:21,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:55:21,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:55:21,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:55:21,835 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:55:21,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:55:21,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:55:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:55:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 14:55:21,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 14:55:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:55:21,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:55:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:55:21,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:55:21,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:55:21,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:55:35,516 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:55:35,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:55:35 BoogieIcfgContainer [2018-10-27 14:55:35,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:55:35,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:55:35,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:55:35,523 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:55:35,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:55:19" (1/3) ... [2018-10-27 14:55:35,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a7d1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:55:35, skipping insertion in model container [2018-10-27 14:55:35,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:21" (2/3) ... [2018-10-27 14:55:35,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a7d1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:55:35, skipping insertion in model container [2018-10-27 14:55:35,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:55:35" (3/3) ... [2018-10-27 14:55:35,526 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label11_true-unreach-call.c [2018-10-27 14:55:35,537 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:55:35,547 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:55:35,566 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:55:35,612 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:55:35,612 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:55:35,612 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:55:35,613 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:55:35,613 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:55:35,613 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:55:35,613 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:55:35,613 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:55:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 14:55:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-27 14:55:35,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:55:35,663 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] [2018-10-27 14:55:35,666 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:55:35,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:55:35,673 INFO L82 PathProgramCache]: Analyzing trace with hash -492133930, now seen corresponding path program 1 times [2018-10-27 14:55:35,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:55:35,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:35,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:55:35,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:35,737 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:55:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:55:36,264 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 14:55:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:55:36,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:55:36,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:55:36,293 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:55:36,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:55:36,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:55:36,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:55:36,321 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 14:55:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:55:46,749 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-10-27 14:55:46,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:55:46,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-10-27 14:55:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:55:46,798 INFO L225 Difference]: With dead ends: 2164 [2018-10-27 14:55:46,798 INFO L226 Difference]: Without dead ends: 1554 [2018-10-27 14:55:46,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:55:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-10-27 14:55:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-10-27 14:55:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-10-27 14:55:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-10-27 14:55:46,993 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 63 [2018-10-27 14:55:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:55:46,996 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-10-27 14:55:46,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:55:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-10-27 14:55:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-27 14:55:47,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:55:47,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:55:47,007 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:55:47,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:55:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1696460921, now seen corresponding path program 1 times [2018-10-27 14:55:47,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:55:47,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:47,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:55:47,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:47,010 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:55:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:55:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:55:47,333 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:55:47,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:55:47,333 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:55:47,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:55:47,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:55:47,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:55:47,336 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-10-27 14:55:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:55:55,994 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-10-27 14:55:55,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:55:55,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2018-10-27 14:55:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:55:56,016 INFO L225 Difference]: With dead ends: 3031 [2018-10-27 14:55:56,017 INFO L226 Difference]: Without dead ends: 1985 [2018-10-27 14:55:56,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:55:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-10-27 14:55:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-10-27 14:55:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-10-27 14:55:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-10-27 14:55:56,092 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 135 [2018-10-27 14:55:56,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:55:56,093 INFO L481 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-10-27 14:55:56,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:55:56,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-10-27 14:55:56,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-27 14:55:56,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:55:56,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:55:56,098 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:55:56,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:55:56,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1297606689, now seen corresponding path program 1 times [2018-10-27 14:55:56,099 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:55:56,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:56,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:55:56,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:56,100 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:55:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:55:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:55:56,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:55:56,569 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:55:56,570 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 139 with the following transitions: [2018-10-27 14:55:56,572 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:55:56,619 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:55:56,620 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:55:57,011 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:56:00,088 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:56:00,090 INFO L272 AbstractInterpreter]: Visited 83 different actions 467 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:56:00,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:00,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:56:00,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:00,137 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:56:00,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:00,158 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:56:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:00,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:56:04,116 WARN L179 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 32 [2018-10-27 14:56:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:06,431 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:56:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:06,984 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 14:56:06,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-10-27 14:56:06,985 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:56:06,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:56:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:56:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-10-27 14:56:06,986 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 3 states. [2018-10-27 14:56:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:56:12,776 INFO L93 Difference]: Finished difference Result 5693 states and 9655 transitions. [2018-10-27 14:56:12,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:56:12,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2018-10-27 14:56:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:56:12,801 INFO L225 Difference]: With dead ends: 5693 [2018-10-27 14:56:12,801 INFO L226 Difference]: Without dead ends: 3740 [2018-10-27 14:56:12,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-10-27 14:56:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2018-10-27 14:56:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3734. [2018-10-27 14:56:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3734 states. [2018-10-27 14:56:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 6077 transitions. [2018-10-27 14:56:12,910 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 6077 transitions. Word has length 138 [2018-10-27 14:56:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:56:12,911 INFO L481 AbstractCegarLoop]: Abstraction has 3734 states and 6077 transitions. [2018-10-27 14:56:12,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:56:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 6077 transitions. [2018-10-27 14:56:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-27 14:56:12,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:56:12,918 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, 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] [2018-10-27 14:56:12,919 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:56:12,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:12,919 INFO L82 PathProgramCache]: Analyzing trace with hash -291330969, now seen corresponding path program 1 times [2018-10-27 14:56:12,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:56:12,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:12,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:12,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:12,921 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:56:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 113 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-27 14:56:13,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:13,202 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:56:13,202 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2018-10-27 14:56:13,202 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1310], [1315], [1317], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:56:13,210 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:56:13,210 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:56:13,324 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:56:15,701 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:56:15,701 INFO L272 AbstractInterpreter]: Visited 104 different actions 593 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:56:15,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:15,736 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:56:15,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:15,736 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:56:15,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:15,750 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:56:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:15,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:56:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:16,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:56:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:16,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 14:56:16,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 14:56:16,636 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 14:56:16,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 14:56:16,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 14:56:16,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-27 14:56:16,638 INFO L87 Difference]: Start difference. First operand 3734 states and 6077 transitions. Second operand 9 states. [2018-10-27 14:56:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:56:23,481 INFO L93 Difference]: Finished difference Result 9302 states and 15012 transitions. [2018-10-27 14:56:23,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 14:56:23,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 235 [2018-10-27 14:56:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:56:23,506 INFO L225 Difference]: With dead ends: 9302 [2018-10-27 14:56:23,506 INFO L226 Difference]: Without dead ends: 4595 [2018-10-27 14:56:23,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 468 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-27 14:56:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2018-10-27 14:56:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 4560. [2018-10-27 14:56:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2018-10-27 14:56:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 5524 transitions. [2018-10-27 14:56:23,649 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 5524 transitions. Word has length 235 [2018-10-27 14:56:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:56:23,650 INFO L481 AbstractCegarLoop]: Abstraction has 4560 states and 5524 transitions. [2018-10-27 14:56:23,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 14:56:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 5524 transitions. [2018-10-27 14:56:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-27 14:56:23,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:56:23,657 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:56:23,657 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:56:23,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1705786468, now seen corresponding path program 1 times [2018-10-27 14:56:23,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:56:23,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:23,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:23,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:23,659 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:56:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 170 proven. 19 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-10-27 14:56:24,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:24,324 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:56:24,324 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-10-27 14:56:24,325 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:56:24,330 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:56:24,330 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:56:24,407 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:56:25,988 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:56:25,989 INFO L272 AbstractInterpreter]: Visited 120 different actions 346 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:56:26,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:26,027 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:56:26,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:26,028 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:56:26,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:26,039 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:56:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:26,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:56:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-27 14:56:26,886 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:56:27,574 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-27 14:56:27,893 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-10-27 14:56:28,102 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-10-27 14:56:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 174 proven. 221 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:56:29,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 14:56:29,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2018-10-27 14:56:29,296 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 14:56:29,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 14:56:29,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 14:56:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2018-10-27 14:56:29,298 INFO L87 Difference]: Start difference. First operand 4560 states and 5524 transitions. Second operand 15 states. [2018-10-27 14:57:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:57:11,397 INFO L93 Difference]: Finished difference Result 27133 states and 35144 transitions. [2018-10-27 14:57:11,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-27 14:57:11,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 333 [2018-10-27 14:57:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:57:11,534 INFO L225 Difference]: With dead ends: 27133 [2018-10-27 14:57:11,534 INFO L226 Difference]: Without dead ends: 21690 [2018-10-27 14:57:11,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 658 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=833, Invalid=3723, Unknown=0, NotChecked=0, Total=4556 [2018-10-27 14:57:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21690 states. [2018-10-27 14:57:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21690 to 20570. [2018-10-27 14:57:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20570 states. [2018-10-27 14:57:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20570 states to 20570 states and 24432 transitions. [2018-10-27 14:57:12,257 INFO L78 Accepts]: Start accepts. Automaton has 20570 states and 24432 transitions. Word has length 333 [2018-10-27 14:57:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:57:12,258 INFO L481 AbstractCegarLoop]: Abstraction has 20570 states and 24432 transitions. [2018-10-27 14:57:12,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 14:57:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 20570 states and 24432 transitions. [2018-10-27 14:57:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-27 14:57:12,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:57:12,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:57:12,275 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:57:12,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:57:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1877965642, now seen corresponding path program 1 times [2018-10-27 14:57:12,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:57:12,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:12,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:57:12,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:12,278 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:57:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:57:13,104 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-10-27 14:57:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:57:13,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:57:13,290 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:57:13,290 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 412 with the following transitions: [2018-10-27 14:57:13,291 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [273], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:57:13,303 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:57:13,304 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:57:13,920 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:57:16,852 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:57:16,853 INFO L272 AbstractInterpreter]: Visited 356 different actions 2105 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:57:16,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:57:16,883 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:57:16,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:57:16,883 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:57:16,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:57:16,898 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:57:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:57:17,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:57:19,385 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 38 [2018-10-27 14:57:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:57:19,610 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:57:19,869 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2018-10-27 14:57:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:57:22,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 14:57:22,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-10-27 14:57:22,680 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:57:22,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:57:22,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:57:22,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-27 14:57:22,682 INFO L87 Difference]: Start difference. First operand 20570 states and 24432 transitions. Second operand 6 states. [2018-10-27 14:57:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:57:42,840 INFO L93 Difference]: Finished difference Result 48122 states and 57563 transitions. [2018-10-27 14:57:42,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:57:42,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 411 [2018-10-27 14:57:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:57:42,930 INFO L225 Difference]: With dead ends: 48122 [2018-10-27 14:57:42,930 INFO L226 Difference]: Without dead ends: 28434 [2018-10-27 14:57:42,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 816 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-10-27 14:57:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28434 states. [2018-10-27 14:57:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28434 to 27527. [2018-10-27 14:57:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27527 states. [2018-10-27 14:57:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27527 states to 27527 states and 32703 transitions. [2018-10-27 14:57:43,562 INFO L78 Accepts]: Start accepts. Automaton has 27527 states and 32703 transitions. Word has length 411 [2018-10-27 14:57:43,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:57:43,563 INFO L481 AbstractCegarLoop]: Abstraction has 27527 states and 32703 transitions. [2018-10-27 14:57:43,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:57:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 27527 states and 32703 transitions. [2018-10-27 14:57:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2018-10-27 14:57:43,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:57:43,588 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:57:43,588 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:57:43,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:57:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash 457550837, now seen corresponding path program 1 times [2018-10-27 14:57:43,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:57:43,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:43,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:57:43,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:43,590 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:57:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:57:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 240 proven. 2 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2018-10-27 14:57:44,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:57:44,423 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:57:44,423 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 473 with the following transitions: [2018-10-27 14:57:44,423 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1508], [1511], [1515], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:57:44,428 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:57:44,430 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:57:44,500 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:57:45,935 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:57:45,936 INFO L272 AbstractInterpreter]: Visited 145 different actions 716 times. Merged at 8 different actions 36 times. Never widened. Found 9 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 14:57:45,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:57:45,945 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:57:45,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:57:45,945 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 14:57:45,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:57:45,953 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:57:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:57:46,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:57:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 572 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-10-27 14:57:46,364 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:57:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 246 proven. 8 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2018-10-27 14:57:46,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 14:57:46,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-10-27 14:57:46,935 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:57:46,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:57:46,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:57:46,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:57:46,936 INFO L87 Difference]: Start difference. First operand 27527 states and 32703 transitions. Second operand 3 states. [2018-10-27 14:57:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:57:49,701 INFO L93 Difference]: Finished difference Result 54128 states and 64506 transitions. [2018-10-27 14:57:49,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:57:49,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2018-10-27 14:57:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:57:49,787 INFO L225 Difference]: With dead ends: 54128 [2018-10-27 14:57:49,787 INFO L226 Difference]: Without dead ends: 27040 [2018-10-27 14:57:49,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 947 GetRequests, 940 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:57:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27040 states. [2018-10-27 14:57:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 27036. [2018-10-27 14:57:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27036 states. [2018-10-27 14:57:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27036 states to 27036 states and 32068 transitions. [2018-10-27 14:57:50,343 INFO L78 Accepts]: Start accepts. Automaton has 27036 states and 32068 transitions. Word has length 472 [2018-10-27 14:57:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:57:50,344 INFO L481 AbstractCegarLoop]: Abstraction has 27036 states and 32068 transitions. [2018-10-27 14:57:50,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:57:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 27036 states and 32068 transitions. [2018-10-27 14:57:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-10-27 14:57:50,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:57:50,370 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:57:50,370 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:57:50,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:57:50,371 INFO L82 PathProgramCache]: Analyzing trace with hash -404401180, now seen corresponding path program 1 times [2018-10-27 14:57:50,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:57:50,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:50,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:57:50,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:50,372 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:57:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:57:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 166 proven. 180 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-10-27 14:57:51,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:57:51,438 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:57:51,438 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 488 with the following transitions: [2018-10-27 14:57:51,438 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1658], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1723], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:57:51,442 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:57:51,443 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:57:51,553 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:57:53,722 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:57:53,723 INFO L272 AbstractInterpreter]: Visited 185 different actions 1288 times. Merged at 8 different actions 62 times. Widened at 1 different actions 3 times. Found 11 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 14:57:53,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:57:53,758 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:57:53,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:57:53,759 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 14:57:53,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:57:53,766 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:57:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:57:53,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:57:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 14:57:54,142 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:57:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 14:57:54,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 14:57:54,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2018-10-27 14:57:54,499 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 14:57:54,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 14:57:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 14:57:54,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-10-27 14:57:54,502 INFO L87 Difference]: Start difference. First operand 27036 states and 32068 transitions. Second operand 12 states. [2018-10-27 14:58:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:58:15,013 INFO L93 Difference]: Finished difference Result 72972 states and 88011 transitions. [2018-10-27 14:58:15,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-27 14:58:15,014 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 487 [2018-10-27 14:58:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:58:15,144 INFO L225 Difference]: With dead ends: 72972 [2018-10-27 14:58:15,144 INFO L226 Difference]: Without dead ends: 46378 [2018-10-27 14:58:15,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1007 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=626, Invalid=2796, Unknown=0, NotChecked=0, Total=3422 [2018-10-27 14:58:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46378 states. [2018-10-27 14:58:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46378 to 43521. [2018-10-27 14:58:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43521 states. [2018-10-27 14:58:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43521 states to 43521 states and 51132 transitions. [2018-10-27 14:58:16,043 INFO L78 Accepts]: Start accepts. Automaton has 43521 states and 51132 transitions. Word has length 487 [2018-10-27 14:58:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:58:16,044 INFO L481 AbstractCegarLoop]: Abstraction has 43521 states and 51132 transitions. [2018-10-27 14:58:16,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 14:58:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 43521 states and 51132 transitions. [2018-10-27 14:58:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2018-10-27 14:58:16,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:58:16,092 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:58:16,092 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:58:16,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:16,093 INFO L82 PathProgramCache]: Analyzing trace with hash -73523263, now seen corresponding path program 1 times [2018-10-27 14:58:16,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:58:16,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:16,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:16,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:16,094 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:58:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:17,155 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-27 14:58:17,369 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-27 14:58:18,091 WARN L179 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-10-27 14:58:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 237 proven. 462 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-27 14:58:19,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:58:19,030 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:58:19,030 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 566 with the following transitions: [2018-10-27 14:58:19,030 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1681], [1686], [1688], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1725], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:58:19,034 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:58:19,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:58:19,118 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:58:23,834 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:58:23,834 INFO L272 AbstractInterpreter]: Visited 187 different actions 735 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 14:58:23,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:23,872 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:58:23,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:58:23,872 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 14:58:23,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:23,883 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:58:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:24,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:58:24,620 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-10-27 14:58:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 540 proven. 55 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-27 14:58:25,587 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:58:26,221 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-10-27 14:58:26,340 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 108 [2018-10-27 14:58:27,597 WARN L179 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2018-10-27 14:58:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 239 proven. 460 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-27 14:58:28,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 14:58:28,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2018-10-27 14:58:28,981 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 14:58:28,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-27 14:58:28,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-27 14:58:28,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2018-10-27 14:58:28,983 INFO L87 Difference]: Start difference. First operand 43521 states and 51132 transitions. Second operand 22 states. [2018-10-27 14:58:29,169 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2018-10-27 14:58:39,037 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2018-10-27 14:58:39,887 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-10-27 14:58:56,759 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 Received shutdown request... [2018-10-27 14:59:10,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-27 14:59:10,313 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 14:59:10,320 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 14:59:10,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:59:10 BoogieIcfgContainer [2018-10-27 14:59:10,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 14:59:10,322 INFO L168 Benchmark]: Toolchain (without parser) took 230973.68 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -130.5 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-27 14:59:10,323 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 14:59:10,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1691.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:10,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 480.12 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -920.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:10,325 INFO L168 Benchmark]: Boogie Preprocessor took 310.81 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:10,326 INFO L168 Benchmark]: RCFGBuilder took 13683.16 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 466.3 MB). Peak memory consumption was 466.3 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:10,327 INFO L168 Benchmark]: TraceAbstraction took 214802.11 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 1.5 GB in the end (delta: 157.8 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-27 14:59:10,332 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1691.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 480.12 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -920.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 310.81 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13683.16 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 466.3 MB). Peak memory consumption was 466.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214802.11 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 1.5 GB in the end (delta: 157.8 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 176]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 176). Cancelled while BasicCegarLoop was constructing difference of abstraction (43521states) and FLOYD_HOARE automaton (currently 41 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (2973 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 214.7s OverallTime, 9 OverallIterations, 5 TraceHistogramMax, 159.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2204 SDtfs, 37543 SDslu, 3190 SDs, 0 SdLazy, 46508 SolverSat, 10138 SolverUnsat, 25 SolverUnknown, 0 SolverNotchecked, 139.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5565 GetRequests, 5307 SyntacticMatches, 24 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3447 ImplicationChecksByTransitivity, 22.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43521occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 20.0s AbstIntTime, 7 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 5457 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 27.7s InterpolantComputationTime, 5480 NumberOfCodeBlocks, 5480 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 8098 ConstructedInterpolants, 611 QuantifiedInterpolants, 24204224 SizeOfPredicates, 30 NumberOfNonLiveVariables, 4162 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 6588/8228 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown