java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 13:48:27,432 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 13:48:27,434 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 13:48:27,450 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 13:48:27,450 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 13:48:27,451 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 13:48:27,452 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 13:48:27,454 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 13:48:27,456 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 13:48:27,457 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 13:48:27,458 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 13:48:27,458 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 13:48:27,459 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 13:48:27,460 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 13:48:27,461 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 13:48:27,462 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 13:48:27,462 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 13:48:27,464 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 13:48:27,466 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 13:48:27,468 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 13:48:27,469 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 13:48:27,470 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 13:48:27,472 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 13:48:27,473 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 13:48:27,473 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 13:48:27,474 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 13:48:27,475 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 13:48:27,475 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 13:48:27,476 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 13:48:27,477 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 13:48:27,477 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 13:48:27,478 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 13:48:27,478 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 13:48:27,479 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 13:48:27,480 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 13:48:27,480 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 13:48:27,481 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 13:48:27,504 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 13:48:27,505 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 13:48:27,505 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 13:48:27,506 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 13:48:27,506 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 13:48:27,507 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 13:48:27,507 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 13:48:27,507 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 13:48:27,507 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 13:48:27,507 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 13:48:27,508 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 13:48:27,509 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 13:48:27,510 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 13:48:27,510 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 13:48:27,511 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 13:48:27,511 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 13:48:27,511 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 13:48:27,511 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 13:48:27,511 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 13:48:27,512 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 13:48:27,512 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 13:48:27,512 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 13:48:27,512 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 13:48:27,512 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 13:48:27,512 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 13:48:27,514 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 13:48:27,515 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 13:48:27,515 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 13:48:27,515 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 13:48:27,515 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 13:48:27,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 13:48:27,516 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 13:48:27,516 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 13:48:27,516 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 13:48:27,567 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 13:48:27,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 13:48:27,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 13:48:27,593 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 13:48:27,594 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 13:48:27,595 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label05_true-unreach-call.c [2018-10-27 13:48:27,657 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cd116967c/d4286de62737486f93c4334290c50791/FLAG4043391af [2018-10-27 13:48:28,307 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 13:48:28,307 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label05_true-unreach-call.c [2018-10-27 13:48:28,341 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cd116967c/d4286de62737486f93c4334290c50791/FLAG4043391af [2018-10-27 13:48:28,361 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cd116967c/d4286de62737486f93c4334290c50791 [2018-10-27 13:48:28,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 13:48:28,374 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 13:48:28,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 13:48:28,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 13:48:28,379 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 13:48:28,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:48:28" (1/1) ... [2018-10-27 13:48:28,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e34a1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:28, skipping insertion in model container [2018-10-27 13:48:28,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:48:28" (1/1) ... [2018-10-27 13:48:28,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 13:48:28,481 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 13:48:29,088 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 13:48:29,093 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 13:48:29,276 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 13:48:29,293 INFO L193 MainTranslator]: Completed translation [2018-10-27 13:48:29,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29 WrapperNode [2018-10-27 13:48:29,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 13:48:29,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 13:48:29,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 13:48:29,295 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 13:48:29,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... [2018-10-27 13:48:29,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... [2018-10-27 13:48:29,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 13:48:29,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 13:48:29,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 13:48:29,562 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 13:48:29,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... [2018-10-27 13:48:29,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... [2018-10-27 13:48:29,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... [2018-10-27 13:48:29,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... [2018-10-27 13:48:29,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... [2018-10-27 13:48:29,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... [2018-10-27 13:48:29,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... [2018-10-27 13:48:29,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 13:48:29,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 13:48:29,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 13:48:29,681 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 13:48:29,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 13:48:29,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 13:48:29,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 13:48:29,757 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 13:48:29,757 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 13:48:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 13:48:29,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 13:48:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 13:48:29,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 13:48:34,009 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 13:48:34,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:48:34 BoogieIcfgContainer [2018-10-27 13:48:34,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 13:48:34,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 13:48:34,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 13:48:34,017 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 13:48:34,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:48:28" (1/3) ... [2018-10-27 13:48:34,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8a3ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:48:34, skipping insertion in model container [2018-10-27 13:48:34,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:29" (2/3) ... [2018-10-27 13:48:34,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8a3ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:48:34, skipping insertion in model container [2018-10-27 13:48:34,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:48:34" (3/3) ... [2018-10-27 13:48:34,021 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label05_true-unreach-call.c [2018-10-27 13:48:34,032 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 13:48:34,046 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 13:48:34,065 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 13:48:34,118 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 13:48:34,118 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 13:48:34,118 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 13:48:34,119 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 13:48:34,119 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 13:48:34,119 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 13:48:34,119 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 13:48:34,119 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 13:48:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-10-27 13:48:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-27 13:48:34,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 13:48:34,179 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 13:48:34,182 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 13:48:34,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 13:48:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 620538673, now seen corresponding path program 1 times [2018-10-27 13:48:34,194 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 13:48:34,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 13:48:34,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 13:48:34,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 13:48:34,254 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 13:48:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 13:48:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 13:48:34,714 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 13:48:34,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 13:48:34,714 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 13:48:34,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 13:48:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 13:48:34,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 13:48:34,739 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-10-27 13:48:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 13:48:38,225 INFO L93 Difference]: Finished difference Result 985 states and 1761 transitions. [2018-10-27 13:48:38,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 13:48:38,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2018-10-27 13:48:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 13:48:38,251 INFO L225 Difference]: With dead ends: 985 [2018-10-27 13:48:38,252 INFO L226 Difference]: Without dead ends: 686 [2018-10-27 13:48:38,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 13:48:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2018-10-27 13:48:38,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2018-10-27 13:48:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2018-10-27 13:48:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1046 transitions. [2018-10-27 13:48:38,359 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1046 transitions. Word has length 71 [2018-10-27 13:48:38,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 13:48:38,360 INFO L481 AbstractCegarLoop]: Abstraction has 686 states and 1046 transitions. [2018-10-27 13:48:38,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 13:48:38,361 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1046 transitions. [2018-10-27 13:48:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-27 13:48:38,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 13:48:38,374 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 13:48:38,374 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 13:48:38,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 13:48:38,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2040216429, now seen corresponding path program 1 times [2018-10-27 13:48:38,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 13:48:38,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 13:48:38,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 13:48:38,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 13:48:38,377 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 13:48:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 13:48:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 13:48:38,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 13:48:38,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 13:48:38,752 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 13:48:38,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 13:48:38,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 13:48:38,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-27 13:48:38,756 INFO L87 Difference]: Start difference. First operand 686 states and 1046 transitions. Second operand 6 states. [2018-10-27 13:48:44,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 13:48:44,033 INFO L93 Difference]: Finished difference Result 2339 states and 3736 transitions. [2018-10-27 13:48:44,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 13:48:44,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2018-10-27 13:48:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 13:48:44,052 INFO L225 Difference]: With dead ends: 2339 [2018-10-27 13:48:44,052 INFO L226 Difference]: Without dead ends: 1659 [2018-10-27 13:48:44,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-27 13:48:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2018-10-27 13:48:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1642. [2018-10-27 13:48:44,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1642 states. [2018-10-27 13:48:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2356 transitions. [2018-10-27 13:48:44,166 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2356 transitions. Word has length 152 [2018-10-27 13:48:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 13:48:44,166 INFO L481 AbstractCegarLoop]: Abstraction has 1642 states and 2356 transitions. [2018-10-27 13:48:44,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 13:48:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2356 transitions. [2018-10-27 13:48:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-27 13:48:44,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 13:48:44,178 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 13:48:44,179 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 13:48:44,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 13:48:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1556450923, now seen corresponding path program 1 times [2018-10-27 13:48:44,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 13:48:44,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 13:48:44,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 13:48:44,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 13:48:44,182 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 13:48:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 13:48:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 13:48:45,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 13:48:45,015 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 13:48:45,016 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 204 with the following transitions: [2018-10-27 13:48:45,018 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-27 13:48:45,068 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 13:48:45,069 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 13:48:45,702 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 13:48:46,729 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 13:48:46,731 INFO L272 AbstractInterpreter]: Visited 140 different actions 406 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-10-27 13:48:46,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 13:48:46,779 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 13:48:46,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 13:48:46,779 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 13:48:46,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 13:48:46,804 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 13:48:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 13:48:46,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 13:48:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 13:48:47,183 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 13:48:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 13:48:47,596 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 13:48:47,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2018-10-27 13:48:47,596 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 13:48:47,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 13:48:47,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 13:48:47,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-27 13:48:47,599 INFO L87 Difference]: Start difference. First operand 1642 states and 2356 transitions. Second operand 3 states. [2018-10-27 13:48:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 13:48:50,040 INFO L93 Difference]: Finished difference Result 4776 states and 7052 transitions. [2018-10-27 13:48:50,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 13:48:50,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2018-10-27 13:48:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 13:48:50,069 INFO L225 Difference]: With dead ends: 4776 [2018-10-27 13:48:50,069 INFO L226 Difference]: Without dead ends: 3140 [2018-10-27 13:48:50,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-27 13:48:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2018-10-27 13:48:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3127. [2018-10-27 13:48:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3127 states. [2018-10-27 13:48:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 4357 transitions. [2018-10-27 13:48:50,181 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 4357 transitions. Word has length 203 [2018-10-27 13:48:50,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 13:48:50,182 INFO L481 AbstractCegarLoop]: Abstraction has 3127 states and 4357 transitions. [2018-10-27 13:48:50,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 13:48:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 4357 transitions. [2018-10-27 13:48:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-27 13:48:50,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 13:48:50,194 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 13:48:50,194 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 13:48:50,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 13:48:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash -937553027, now seen corresponding path program 1 times [2018-10-27 13:48:50,195 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 13:48:50,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 13:48:50,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 13:48:50,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 13:48:50,197 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 13:48:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 13:48:50,487 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 13:48:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 128 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 13:48:50,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 13:48:50,917 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 13:48:50,918 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 240 with the following transitions: [2018-10-27 13:48:50,918 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-27 13:48:50,923 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 13:48:50,923 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 13:48:51,048 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 13:48:51,880 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 13:48:51,880 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-10-27 13:48:51,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 13:48:51,906 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 13:48:53,139 INFO L227 lantSequenceWeakener]: Weakened 230 states. On average, predicates are now at 73.83% of their original sizes. [2018-10-27 13:48:53,140 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 13:48:53,491 INFO L415 sIntCurrentIteration]: We unified 238 AI predicates to 238 [2018-10-27 13:48:53,492 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 13:48:53,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 13:48:53,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-10-27 13:48:53,493 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 13:48:53,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 13:48:53,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 13:48:53,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 13:48:53,495 INFO L87 Difference]: Start difference. First operand 3127 states and 4357 transitions. Second operand 7 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown