java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label25_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:19:37,215 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:19:37,217 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:19:37,230 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:19:37,230 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:19:37,231 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:19:37,233 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:19:37,235 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:19:37,237 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:19:37,238 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:19:37,239 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:19:37,240 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:19:37,241 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:19:37,242 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:19:37,243 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:19:37,244 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:19:37,245 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:19:37,247 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:19:37,249 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:19:37,251 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:19:37,252 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:19:37,254 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:19:37,256 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:19:37,257 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:19:37,257 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:19:37,258 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:19:37,259 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:19:37,260 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:19:37,261 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:19:37,264 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:19:37,265 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:19:37,265 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:19:37,266 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:19:37,266 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:19:37,269 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:19:37,270 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:19:37,271 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:19:37,302 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:19:37,303 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:19:37,305 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:19:37,305 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:19:37,305 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:19:37,305 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:19:37,305 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:19:37,306 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:19:37,306 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:19:37,306 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:19:37,306 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:19:37,306 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:19:37,307 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:19:37,308 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:19:37,308 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:19:37,309 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:19:37,309 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:19:37,309 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:19:37,309 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:19:37,309 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:19:37,311 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:19:37,312 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:19:37,312 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:19:37,312 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:19:37,312 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:19:37,312 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:19:37,313 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:19:37,313 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:19:37,313 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:19:37,313 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:19:37,314 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:19:37,314 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:19:37,314 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:19:37,314 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:19:37,314 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:19:37,391 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:19:37,409 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:19:37,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:19:37,415 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:19:37,416 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:19:37,417 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label25_false-unreach-call.c [2018-11-07 18:19:37,495 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e914d2dba/8e2028e759e442abbce76210b3e67dd2/FLAGd3a9e1ba6 [2018-11-07 18:19:38,290 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:19:38,292 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label25_false-unreach-call.c [2018-11-07 18:19:38,324 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e914d2dba/8e2028e759e442abbce76210b3e67dd2/FLAGd3a9e1ba6 [2018-11-07 18:19:38,347 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e914d2dba/8e2028e759e442abbce76210b3e67dd2 [2018-11-07 18:19:38,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:19:38,363 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:19:38,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:19:38,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:19:38,373 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:19:38,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:19:38" (1/1) ... [2018-11-07 18:19:38,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73c61966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:38, skipping insertion in model container [2018-11-07 18:19:38,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:19:38" (1/1) ... [2018-11-07 18:19:38,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:19:38,525 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:19:39,733 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:19:39,743 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:19:40,154 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:19:40,182 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:19:40,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40 WrapperNode [2018-11-07 18:19:40,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:19:40,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:19:40,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:19:40,185 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:19:40,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... [2018-11-07 18:19:40,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... [2018-11-07 18:19:40,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:19:40,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:19:40,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:19:40,468 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:19:40,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... [2018-11-07 18:19:40,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... [2018-11-07 18:19:40,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... [2018-11-07 18:19:40,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... [2018-11-07 18:19:40,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... [2018-11-07 18:19:40,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... [2018-11-07 18:19:40,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... [2018-11-07 18:19:40,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:19:40,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:19:40,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:19:40,676 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:19:40,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:19:40,754 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:19:40,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:19:40,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:19:40,755 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:19:40,755 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:19:40,756 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:19:40,756 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:19:40,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:19:40,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:19:40,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:19:40,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:19:49,496 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:19:49,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:19:49 BoogieIcfgContainer [2018-11-07 18:19:49,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:19:49,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:19:49,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:19:49,502 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:19:49,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:19:38" (1/3) ... [2018-11-07 18:19:49,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a937a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:19:49, skipping insertion in model container [2018-11-07 18:19:49,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:19:40" (2/3) ... [2018-11-07 18:19:49,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a937a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:19:49, skipping insertion in model container [2018-11-07 18:19:49,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:19:49" (3/3) ... [2018-11-07 18:19:49,506 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label25_false-unreach-call.c [2018-11-07 18:19:49,517 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:19:49,527 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:19:49,547 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:19:49,593 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:19:49,593 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:19:49,593 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:19:49,594 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:19:49,594 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:19:49,594 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:19:49,594 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:19:49,594 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:19:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 18:19:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-07 18:19:49,649 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:19:49,650 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] [2018-11-07 18:19:49,652 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:19:49,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:19:49,659 INFO L82 PathProgramCache]: Analyzing trace with hash 621618756, now seen corresponding path program 1 times [2018-11-07 18:19:49,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:19:49,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:19:49,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:19:49,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:19:49,720 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:19:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:19:50,169 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 18:19:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:19:50,183 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:19:50,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:19:50,184 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:19:50,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:19:50,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:19:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:19:50,234 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 18:19:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:19:59,245 INFO L93 Difference]: Finished difference Result 2133 states and 3959 transitions. [2018-11-07 18:19:59,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:19:59,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-11-07 18:19:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:19:59,281 INFO L225 Difference]: With dead ends: 2133 [2018-11-07 18:19:59,281 INFO L226 Difference]: Without dead ends: 1523 [2018-11-07 18:19:59,294 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:19:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2018-11-07 18:19:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1516. [2018-11-07 18:19:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2018-11-07 18:19:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2287 transitions. [2018-11-07 18:19:59,460 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2287 transitions. Word has length 30 [2018-11-07 18:19:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:19:59,460 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 2287 transitions. [2018-11-07 18:19:59,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:19:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2287 transitions. [2018-11-07 18:19:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-07 18:19:59,466 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:19:59,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:19:59,467 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:19:59,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:19:59,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2146255078, now seen corresponding path program 1 times [2018-11-07 18:19:59,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:19:59,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:19:59,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:19:59,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:19:59,469 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:19:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:19:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:19:59,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:19:59,857 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:19:59,858 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 106 with the following transitions: [2018-11-07 18:19:59,860 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [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] [2018-11-07 18:19:59,907 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:19:59,907 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:20:00,409 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:20:01,046 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:20:01,047 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 18:20:01,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:01,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:20:01,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:20:01,108 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:20:01,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:01,124 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:20:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:01,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:20:17,469 WARN L179 SmtUtils]: Spent 15.82 s on a formula simplification. DAG size of input: 135 DAG size of output: 83 [2018-11-07 18:20:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:20:17,740 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:20:18,432 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-11-07 18:20:19,556 WARN L179 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-11-07 18:20:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:20:19,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 18:20:19,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-11-07 18:20:19,936 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:20:19,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:20:19,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:20:19,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:20:19,939 INFO L87 Difference]: Start difference. First operand 1516 states and 2287 transitions. Second operand 6 states. [2018-11-07 18:20:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:20:33,908 INFO L93 Difference]: Finished difference Result 5741 states and 8892 transitions. [2018-11-07 18:20:33,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 18:20:33,912 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2018-11-07 18:20:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:20:33,943 INFO L225 Difference]: With dead ends: 5741 [2018-11-07 18:20:33,944 INFO L226 Difference]: Without dead ends: 4231 [2018-11-07 18:20:33,954 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:20:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2018-11-07 18:20:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 4196. [2018-11-07 18:20:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4196 states. [2018-11-07 18:20:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 6323 transitions. [2018-11-07 18:20:34,105 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 6323 transitions. Word has length 105 [2018-11-07 18:20:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:20:34,105 INFO L480 AbstractCegarLoop]: Abstraction has 4196 states and 6323 transitions. [2018-11-07 18:20:34,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:20:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 6323 transitions. [2018-11-07 18:20:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-11-07 18:20:34,124 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:20:34,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:20:34,125 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:20:34,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:34,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1301430671, now seen corresponding path program 1 times [2018-11-07 18:20:34,126 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:20:34,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:34,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:34,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:34,127 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:20:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:20:34,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:20:34,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:20:34,707 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:20:34,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:20:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:20:34,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:20:34,711 INFO L87 Difference]: Start difference. First operand 4196 states and 6323 transitions. Second operand 6 states. [2018-11-07 18:20:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:20:39,847 INFO L93 Difference]: Finished difference Result 12517 states and 19757 transitions. [2018-11-07 18:20:39,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:20:39,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2018-11-07 18:20:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:20:39,916 INFO L225 Difference]: With dead ends: 12517 [2018-11-07 18:20:39,917 INFO L226 Difference]: Without dead ends: 8327 [2018-11-07 18:20:39,939 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:20:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2018-11-07 18:20:40,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 8258. [2018-11-07 18:20:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8258 states. [2018-11-07 18:20:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8258 states to 8258 states and 11992 transitions. [2018-11-07 18:20:40,197 INFO L78 Accepts]: Start accepts. Automaton has 8258 states and 11992 transitions. Word has length 172 [2018-11-07 18:20:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:20:40,197 INFO L480 AbstractCegarLoop]: Abstraction has 8258 states and 11992 transitions. [2018-11-07 18:20:40,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:20:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 8258 states and 11992 transitions. [2018-11-07 18:20:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-07 18:20:40,203 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:20:40,204 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:20:40,204 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:20:40,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:40,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1752335123, now seen corresponding path program 1 times [2018-11-07 18:20:40,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:20:40,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:40,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:40,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:40,206 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:20:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:40,550 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:20:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 18:20:40,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:20:40,768 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:20:40,768 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 189 with the following transitions: [2018-11-07 18:20:40,769 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [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], [1262], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:20:40,775 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:20:40,775 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:20:40,857 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:20:41,413 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:20:41,413 INFO L272 AbstractInterpreter]: Visited 92 different actions 262 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 18:20:41,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:41,451 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:20:41,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:20:41,452 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:20:41,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:41,465 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:20:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:41,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:20:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:20:41,880 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:20:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:20:42,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:20:42,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 18:20:42,141 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:20:42,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:20:42,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:20:42,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:20:42,142 INFO L87 Difference]: Start difference. First operand 8258 states and 11992 transitions. Second operand 9 states. [2018-11-07 18:20:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:20:48,984 INFO L93 Difference]: Finished difference Result 20076 states and 29371 transitions. [2018-11-07 18:20:48,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 18:20:48,985 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2018-11-07 18:20:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:20:49,042 INFO L225 Difference]: With dead ends: 20076 [2018-11-07 18:20:49,042 INFO L226 Difference]: Without dead ends: 11824 [2018-11-07 18:20:49,081 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 374 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:20:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11824 states. [2018-11-07 18:20:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11824 to 11801. [2018-11-07 18:20:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11801 states. [2018-11-07 18:20:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11801 states to 11801 states and 15120 transitions. [2018-11-07 18:20:49,399 INFO L78 Accepts]: Start accepts. Automaton has 11801 states and 15120 transitions. Word has length 188 [2018-11-07 18:20:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:20:49,399 INFO L480 AbstractCegarLoop]: Abstraction has 11801 states and 15120 transitions. [2018-11-07 18:20:49,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:20:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 11801 states and 15120 transitions. [2018-11-07 18:20:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-07 18:20:49,405 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:20:49,406 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:20:49,406 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:20:49,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:49,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1245707981, now seen corresponding path program 1 times [2018-11-07 18:20:49,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:20:49,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:49,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:49,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:49,408 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:20:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:49,864 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:20:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 95 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 18:20:50,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:20:50,110 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:20:50,111 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 206 with the following transitions: [2018-11-07 18:20:50,111 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [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], [1278], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:20:50,115 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:20:50,115 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:20:50,201 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:20:50,954 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:20:50,955 INFO L272 AbstractInterpreter]: Visited 97 different actions 381 times. Merged at 7 different actions 28 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:20:50,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:50,982 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:20:50,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:20:50,982 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:20:51,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:51,006 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:20:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:51,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:20:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 18:20:51,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:20:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 18:20:51,701 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:20:51,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-07 18:20:51,701 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:20:51,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:20:51,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:20:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:20:51,707 INFO L87 Difference]: Start difference. First operand 11801 states and 15120 transitions. Second operand 3 states. [2018-11-07 18:20:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:20:54,435 INFO L93 Difference]: Finished difference Result 23596 states and 30234 transitions. [2018-11-07 18:20:54,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:20:54,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2018-11-07 18:20:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:20:54,487 INFO L225 Difference]: With dead ends: 23596 [2018-11-07 18:20:54,488 INFO L226 Difference]: Without dead ends: 11801 [2018-11-07 18:20:54,538 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 410 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:20:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11801 states. [2018-11-07 18:20:54,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11801 to 11801. [2018-11-07 18:20:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11801 states. [2018-11-07 18:20:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11801 states to 11801 states and 14363 transitions. [2018-11-07 18:20:54,757 INFO L78 Accepts]: Start accepts. Automaton has 11801 states and 14363 transitions. Word has length 205 [2018-11-07 18:20:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:20:54,758 INFO L480 AbstractCegarLoop]: Abstraction has 11801 states and 14363 transitions. [2018-11-07 18:20:54,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:20:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 11801 states and 14363 transitions. [2018-11-07 18:20:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-11-07 18:20:54,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:20:54,765 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:20:54,765 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:20:54,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:20:54,766 INFO L82 PathProgramCache]: Analyzing trace with hash -795953761, now seen corresponding path program 1 times [2018-11-07 18:20:54,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:20:54,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:54,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:20:54,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:20:54,768 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:20:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:20:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:20:55,144 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:20:55,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:20:55,144 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:20:55,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:20:55,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:20:55,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:20:55,146 INFO L87 Difference]: Start difference. First operand 11801 states and 14363 transitions. Second operand 4 states. [2018-11-07 18:21:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:21:00,616 INFO L93 Difference]: Finished difference Result 31552 states and 38956 transitions. [2018-11-07 18:21:00,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:21:00,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2018-11-07 18:21:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:21:00,690 INFO L225 Difference]: With dead ends: 31552 [2018-11-07 18:21:00,691 INFO L226 Difference]: Without dead ends: 19757 [2018-11-07 18:21:00,724 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:21:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19757 states. [2018-11-07 18:21:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19757 to 19744. [2018-11-07 18:21:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19744 states. [2018-11-07 18:21:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19744 states to 19744 states and 23492 transitions. [2018-11-07 18:21:01,088 INFO L78 Accepts]: Start accepts. Automaton has 19744 states and 23492 transitions. Word has length 260 [2018-11-07 18:21:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:21:01,089 INFO L480 AbstractCegarLoop]: Abstraction has 19744 states and 23492 transitions. [2018-11-07 18:21:01,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:21:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 19744 states and 23492 transitions. [2018-11-07 18:21:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-11-07 18:21:01,102 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:21:01,102 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:21:01,102 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:21:01,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:01,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1849561965, now seen corresponding path program 1 times [2018-11-07 18:21:01,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:21:01,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:01,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:01,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:01,104 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:21:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 18:21:01,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:01,742 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:21:01,742 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 305 with the following transitions: [2018-11-07 18:21:01,742 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [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], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1333], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:21:01,748 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:21:01,749 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:21:01,910 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:21:03,267 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:21:03,267 INFO L272 AbstractInterpreter]: Visited 109 different actions 644 times. Merged at 8 different actions 47 times. Widened at 1 different actions 1 times. Found 11 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:21:03,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:03,308 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:21:03,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:03,308 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:21:03,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:03,320 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:21:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:03,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:21:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 18:21:03,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:21:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 18:21:03,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:21:03,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-11-07 18:21:03,845 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:21:03,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:21:03,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:21:03,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:21:03,846 INFO L87 Difference]: Start difference. First operand 19744 states and 23492 transitions. Second operand 7 states. [2018-11-07 18:21:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:21:11,931 INFO L93 Difference]: Finished difference Result 53237 states and 64830 transitions. [2018-11-07 18:21:11,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:21:11,933 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 304 [2018-11-07 18:21:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:21:12,029 INFO L225 Difference]: With dead ends: 53237 [2018-11-07 18:21:12,029 INFO L226 Difference]: Without dead ends: 30374 [2018-11-07 18:21:12,092 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 609 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:21:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30374 states. [2018-11-07 18:21:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30374 to 28524. [2018-11-07 18:21:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28524 states. [2018-11-07 18:21:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28524 states to 28524 states and 32991 transitions. [2018-11-07 18:21:12,816 INFO L78 Accepts]: Start accepts. Automaton has 28524 states and 32991 transitions. Word has length 304 [2018-11-07 18:21:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:21:12,817 INFO L480 AbstractCegarLoop]: Abstraction has 28524 states and 32991 transitions. [2018-11-07 18:21:12,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:21:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 28524 states and 32991 transitions. [2018-11-07 18:21:12,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-11-07 18:21:12,831 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:21:12,832 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:21:12,832 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:21:12,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:12,833 INFO L82 PathProgramCache]: Analyzing trace with hash 228019061, now seen corresponding path program 1 times [2018-11-07 18:21:12,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:21:12,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:12,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:12,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:12,834 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:21:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-07 18:21:13,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:13,460 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:21:13,461 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 318 with the following transitions: [2018-11-07 18:21:13,461 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [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], [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], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:21:13,468 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:21:13,468 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:21:13,563 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:21:14,914 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:21:14,914 INFO L272 AbstractInterpreter]: Visited 208 different actions 820 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:21:14,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:14,940 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:21:14,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:14,940 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:21:14,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:14,952 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:21:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:15,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:21:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-07 18:21:15,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:21:16,526 WARN L179 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-11-07 18:21:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:21:17,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:21:17,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-11-07 18:21:17,183 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:21:17,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:21:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:21:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:21:17,185 INFO L87 Difference]: Start difference. First operand 28524 states and 32991 transitions. Second operand 9 states. [2018-11-07 18:21:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:21:28,012 INFO L93 Difference]: Finished difference Result 77844 states and 92426 transitions. [2018-11-07 18:21:28,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-07 18:21:28,013 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2018-11-07 18:21:28,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:21:28,163 INFO L225 Difference]: With dead ends: 77844 [2018-11-07 18:21:28,163 INFO L226 Difference]: Without dead ends: 47544 [2018-11-07 18:21:28,214 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 628 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2018-11-07 18:21:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47544 states. [2018-11-07 18:21:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47544 to 46205. [2018-11-07 18:21:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46205 states. [2018-11-07 18:21:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46205 states to 46205 states and 54737 transitions. [2018-11-07 18:21:29,022 INFO L78 Accepts]: Start accepts. Automaton has 46205 states and 54737 transitions. Word has length 317 [2018-11-07 18:21:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:21:29,022 INFO L480 AbstractCegarLoop]: Abstraction has 46205 states and 54737 transitions. [2018-11-07 18:21:29,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:21:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 46205 states and 54737 transitions. [2018-11-07 18:21:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-11-07 18:21:29,048 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:21:29,049 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:21:29,049 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:21:29,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:29,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1636829654, now seen corresponding path program 1 times [2018-11-07 18:21:29,050 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:21:29,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:29,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:29,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:29,051 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:21:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 75 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-07 18:21:30,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:30,042 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:21:30,042 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 426 with the following transitions: [2018-11-07 18:21:30,043 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [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], [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], [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], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:21:30,048 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:21:30,048 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:21:30,152 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:21:31,679 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:21:31,679 INFO L272 AbstractInterpreter]: Visited 209 different actions 1040 times. Merged at 8 different actions 43 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 18:21:31,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:31,711 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:21:31,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:31,712 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:21:31,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:31,724 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:21:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:31,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:21:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:21:32,085 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:21:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:21:32,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:21:32,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-07 18:21:32,414 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:21:32,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:21:32,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:21:32,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:21:32,416 INFO L87 Difference]: Start difference. First operand 46205 states and 54737 transitions. Second operand 10 states. [2018-11-07 18:21:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:21:46,132 INFO L93 Difference]: Finished difference Result 144567 states and 169859 transitions. [2018-11-07 18:21:46,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-07 18:21:46,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 425 [2018-11-07 18:21:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:21:46,326 INFO L225 Difference]: With dead ends: 144567 [2018-11-07 18:21:46,326 INFO L226 Difference]: Without dead ends: 72395 [2018-11-07 18:21:46,446 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 862 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2018-11-07 18:21:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72395 states. [2018-11-07 18:21:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72395 to 63255. [2018-11-07 18:21:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63255 states. [2018-11-07 18:21:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63255 states to 63255 states and 73995 transitions. [2018-11-07 18:21:47,464 INFO L78 Accepts]: Start accepts. Automaton has 63255 states and 73995 transitions. Word has length 425 [2018-11-07 18:21:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:21:47,464 INFO L480 AbstractCegarLoop]: Abstraction has 63255 states and 73995 transitions. [2018-11-07 18:21:47,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:21:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 63255 states and 73995 transitions. [2018-11-07 18:21:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-11-07 18:21:47,492 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:21:47,492 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:21:47,492 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:21:47,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash 629548986, now seen corresponding path program 1 times [2018-11-07 18:21:47,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:21:47,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:47,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:47,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:21:47,494 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:21:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 81 proven. 269 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:21:48,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:48,697 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:21:48,697 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 428 with the following transitions: [2018-11-07 18:21:48,697 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [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], [1384], [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], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:21:48,700 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:21:48,700 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:21:48,752 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:21:50,291 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:21:50,291 INFO L272 AbstractInterpreter]: Visited 209 different actions 1244 times. Merged at 8 different actions 48 times. Widened at 1 different actions 2 times. Found 9 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 18:21:50,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:21:50,296 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:21:50,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:21:50,296 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:21:50,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:21:50,306 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:21:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:21:50,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:21:51,105 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:21:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-07 18:21:51,360 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:21:51,792 WARN L179 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-11-07 18:21:51,983 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2018-11-07 18:21:52,325 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 18:21:52,358 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-11-07 18:21:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 75 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:21:53,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:21:53,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2018-11-07 18:21:53,555 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:21:53,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 18:21:53,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 18:21:53,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:21:53,557 INFO L87 Difference]: Start difference. First operand 63255 states and 73995 transitions. Second operand 15 states. [2018-11-07 18:22:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:22:14,444 INFO L93 Difference]: Finished difference Result 158979 states and 192373 transitions. [2018-11-07 18:22:14,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-07 18:22:14,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 427 [2018-11-07 18:22:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:22:14,692 INFO L225 Difference]: With dead ends: 158979 [2018-11-07 18:22:14,692 INFO L226 Difference]: Without dead ends: 94806 [2018-11-07 18:22:14,783 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 889 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1055, Invalid=3915, Unknown=0, NotChecked=0, Total=4970 [2018-11-07 18:22:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94806 states. [2018-11-07 18:22:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94806 to 85940. [2018-11-07 18:22:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85940 states. [2018-11-07 18:22:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85940 states to 85940 states and 100798 transitions. [2018-11-07 18:22:16,300 INFO L78 Accepts]: Start accepts. Automaton has 85940 states and 100798 transitions. Word has length 427 [2018-11-07 18:22:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:22:16,301 INFO L480 AbstractCegarLoop]: Abstraction has 85940 states and 100798 transitions. [2018-11-07 18:22:16,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 18:22:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 85940 states and 100798 transitions. [2018-11-07 18:22:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-11-07 18:22:16,322 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:22:16,322 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:22:16,322 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:22:16,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:22:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1016124872, now seen corresponding path program 1 times [2018-11-07 18:22:16,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:22:16,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:22:16,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:22:16,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:22:16,324 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:22:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:22:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 73 proven. 238 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-07 18:22:17,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:22:17,967 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:22:17,967 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 471 with the following transitions: [2018-11-07 18:22:17,968 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [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], [1626], [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], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:22:17,971 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:22:17,971 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:22:18,011 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:22:19,584 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:22:19,584 INFO L272 AbstractInterpreter]: Visited 209 different actions 1035 times. Merged at 8 different actions 38 times. Never widened. Found 9 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:22:19,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:22:19,594 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:22:19,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:22:19,594 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:22:19,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:22:19,603 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:22:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:22:19,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:22:20,383 WARN L179 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-11-07 18:22:20,996 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 17 [2018-11-07 18:22:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 75 proven. 295 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-07 18:22:21,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:22:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:22:21,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:22:21,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 5] total 21 [2018-11-07 18:22:21,844 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:22:21,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:22:21,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:22:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:22:21,846 INFO L87 Difference]: Start difference. First operand 85940 states and 100798 transitions. Second operand 18 states. [2018-11-07 18:22:46,181 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 16 Received shutdown request... [2018-11-07 18:23:25,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2018-11-07 18:23:25,942 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:23:25,948 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:23:25,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:23:25 BoogieIcfgContainer [2018-11-07 18:23:25,949 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:23:25,950 INFO L168 Benchmark]: Toolchain (without parser) took 227588.90 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -557.0 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-11-07 18:23:25,951 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:23:25,951 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1818.92 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. [2018-11-07 18:23:25,952 INFO L168 Benchmark]: Boogie Procedure Inliner took 282.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -931.4 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:23:25,953 INFO L168 Benchmark]: Boogie Preprocessor took 207.49 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:23:25,954 INFO L168 Benchmark]: RCFGBuilder took 8822.17 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: 461.5 MB). Peak memory consumption was 461.5 MB. Max. memory is 7.1 GB. [2018-11-07 18:23:25,954 INFO L168 Benchmark]: TraceAbstraction took 216450.72 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 1.9 GB in the end (delta: -238.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 18:23:25,959 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1818.92 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 282.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -931.4 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 207.49 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8822.17 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: 461.5 MB). Peak memory consumption was 461.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216450.72 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 1.9 GB in the end (delta: -238.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 77). Cancelled while BasicCegarLoop was constructing difference of abstraction (85940states) and FLOYD_HOARE automaton (currently 183 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (100079 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 216.3s OverallTime, 11 OverallIterations, 4 TraceHistogramMax, 162.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3946 SDtfs, 51494 SDslu, 6598 SDs, 0 SdLazy, 86066 SolverSat, 14224 SolverUnsat, 550 SolverUnknown, 0 SolverNotchecked, 127.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5300 GetRequests, 4919 SyntacticMatches, 18 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16976 ImplicationChecksByTransitivity, 35.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85940occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.7s AbstIntTime, 8 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.5s AutomataMinimizationTime, 10 MinimizatonAttempts, 21342 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 33.9s InterpolantComputationTime, 5344 NumberOfCodeBlocks, 5344 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 7758 ConstructedInterpolants, 316 QuantifiedInterpolants, 13702008 SizeOfPredicates, 16 NumberOfNonLiveVariables, 4124 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 4247/5701 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown