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/Problem14_label21_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:24:36,532 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:24:36,535 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:24:36,550 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:24:36,551 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:24:36,552 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:24:36,553 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:24:36,555 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:24:36,556 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:24:36,557 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:24:36,558 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:24:36,558 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:24:36,559 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:24:36,560 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:24:36,561 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:24:36,562 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:24:36,563 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:24:36,565 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:24:36,567 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:24:36,568 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:24:36,570 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:24:36,572 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:24:36,574 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:24:36,576 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:24:36,576 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:24:36,580 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:24:36,581 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:24:36,582 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:24:36,583 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:24:36,586 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:24:36,587 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:24:36,587 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 14:24:36,587 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:24:36,589 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:24:36,590 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:24:36,591 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:24:36,592 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:24:36,619 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:24:36,619 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:24:36,620 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:24:36,621 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:24:36,621 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:24:36,621 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:24:36,621 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:24:36,621 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:24:36,621 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:24:36,622 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:24:36,622 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:24:36,622 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:24:36,623 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:24:36,623 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:24:36,623 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:24:36,623 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:24:36,623 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:24:36,624 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:24:36,624 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:24:36,624 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:24:36,624 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:24:36,624 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:24:36,624 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:24:36,625 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:24:36,625 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:24:36,625 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:24:36,625 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:24:36,625 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:24:36,626 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:24:36,626 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:24:36,626 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:24:36,626 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:24:36,626 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:24:36,627 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:24:36,676 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:24:36,689 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:24:36,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:24:36,694 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:24:36,695 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:24:36,695 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label21_true-unreach-call_false-termination.c [2018-10-27 14:24:36,757 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6cd3f2bf9/8fd8c82d5a494f5b8862f0b35004a870/FLAG855cff2b8 [2018-10-27 14:24:37,400 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:24:37,401 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label21_true-unreach-call_false-termination.c [2018-10-27 14:24:37,419 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6cd3f2bf9/8fd8c82d5a494f5b8862f0b35004a870/FLAG855cff2b8 [2018-10-27 14:24:37,444 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6cd3f2bf9/8fd8c82d5a494f5b8862f0b35004a870 [2018-10-27 14:24:37,458 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:24:37,460 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:24:37,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:24:37,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:24:37,466 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:24:37,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:24:37" (1/1) ... [2018-10-27 14:24:37,470 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 02:24:37, skipping insertion in model container [2018-10-27 14:24:37,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:24:37" (1/1) ... [2018-10-27 14:24:37,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:24:37,575 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:24:38,032 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:24:38,041 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:24:38,198 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:24:38,218 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:24:38,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38 WrapperNode [2018-10-27 14:24:38,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:24:38,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:24:38,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:24:38,220 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:24:38,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... [2018-10-27 14:24:38,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... [2018-10-27 14:24:38,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:24:38,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:24:38,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:24:38,450 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:24:38,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... [2018-10-27 14:24:38,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... [2018-10-27 14:24:38,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... [2018-10-27 14:24:38,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... [2018-10-27 14:24:38,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... [2018-10-27 14:24:38,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... [2018-10-27 14:24:38,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... [2018-10-27 14:24:38,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:24:38,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:24:38,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:24:38,574 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:24:38,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:24:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:24:38,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:24:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:24:38,652 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:24:38,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:24:38,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:24:38,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:24:38,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:24:42,478 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:24:42,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:24:42 BoogieIcfgContainer [2018-10-27 14:24:42,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:24:42,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:24:42,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:24:42,484 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:24:42,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:24:37" (1/3) ... [2018-10-27 14:24:42,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10bbb818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:24:42, skipping insertion in model container [2018-10-27 14:24:42,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:38" (2/3) ... [2018-10-27 14:24:42,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10bbb818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:24:42, skipping insertion in model container [2018-10-27 14:24:42,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:24:42" (3/3) ... [2018-10-27 14:24:42,489 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label21_true-unreach-call_false-termination.c [2018-10-27 14:24:42,500 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:24:42,510 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:24:42,528 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:24:42,569 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:24:42,570 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:24:42,570 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:24:42,570 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:24:42,570 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:24:42,571 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:24:42,571 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:24:42,571 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:24:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 14:24:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-27 14:24:42,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:24:42,626 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] [2018-10-27 14:24:42,629 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:24:42,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:42,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1101027815, now seen corresponding path program 1 times [2018-10-27 14:24:42,637 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:24:42,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:42,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:24:42,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:42,688 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:24:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:24:43,052 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:24:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:24:43,183 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:24:43,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 14:24:43,183 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:24:43,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:24:43,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:24:43,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 14:24:43,217 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-27 14:24:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:24:45,153 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-27 14:24:45,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:24:45,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-10-27 14:24:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:24:45,181 INFO L225 Difference]: With dead ends: 691 [2018-10-27 14:24:45,181 INFO L226 Difference]: Without dead ends: 434 [2018-10-27 14:24:45,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 14:24:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-27 14:24:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-27 14:24:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-27 14:24:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 767 transitions. [2018-10-27 14:24:45,285 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 767 transitions. Word has length 41 [2018-10-27 14:24:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:24:45,286 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 767 transitions. [2018-10-27 14:24:45,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:24:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 767 transitions. [2018-10-27 14:24:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-27 14:24:45,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:24:45,300 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:24:45,301 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:24:45,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:45,302 INFO L82 PathProgramCache]: Analyzing trace with hash 212852571, now seen corresponding path program 1 times [2018-10-27 14:24:45,303 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:24:45,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:45,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:24:45,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:45,306 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:24:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:24:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:24:45,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:24:45,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:24:45,698 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:24:45,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:24:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:24:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:24:45,701 INFO L87 Difference]: Start difference. First operand 434 states and 767 transitions. Second operand 5 states. [2018-10-27 14:24:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:24:50,280 INFO L93 Difference]: Finished difference Result 1416 states and 2580 transitions. [2018-10-27 14:24:50,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:24:50,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2018-10-27 14:24:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:24:50,293 INFO L225 Difference]: With dead ends: 1416 [2018-10-27 14:24:50,293 INFO L226 Difference]: Without dead ends: 988 [2018-10-27 14:24:50,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:24:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2018-10-27 14:24:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 973. [2018-10-27 14:24:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2018-10-27 14:24:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1540 transitions. [2018-10-27 14:24:50,423 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1540 transitions. Word has length 118 [2018-10-27 14:24:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:24:50,424 INFO L481 AbstractCegarLoop]: Abstraction has 973 states and 1540 transitions. [2018-10-27 14:24:50,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:24:50,425 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1540 transitions. [2018-10-27 14:24:50,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-27 14:24:50,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:24:50,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:24:50,439 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:24:50,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2137480229, now seen corresponding path program 1 times [2018-10-27 14:24:50,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:24:50,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:50,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:24:50,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:50,448 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:24:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:24:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:24:50,781 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:24:50,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:24:50,781 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:24:50,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:24:50,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:24:50,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:24:50,782 INFO L87 Difference]: Start difference. First operand 973 states and 1540 transitions. Second operand 6 states. [2018-10-27 14:24:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:24:54,102 INFO L93 Difference]: Finished difference Result 2353 states and 3939 transitions. [2018-10-27 14:24:54,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:24:54,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2018-10-27 14:24:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:24:54,121 INFO L225 Difference]: With dead ends: 2353 [2018-10-27 14:24:54,121 INFO L226 Difference]: Without dead ends: 1386 [2018-10-27 14:24:54,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:24:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2018-10-27 14:24:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1352. [2018-10-27 14:24:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2018-10-27 14:24:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 2126 transitions. [2018-10-27 14:24:54,216 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 2126 transitions. Word has length 182 [2018-10-27 14:24:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:24:54,217 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 2126 transitions. [2018-10-27 14:24:54,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:24:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 2126 transitions. [2018-10-27 14:24:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-27 14:24:54,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:24:54,223 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 14:24:54,223 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:24:54,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:54,223 INFO L82 PathProgramCache]: Analyzing trace with hash -779677212, now seen corresponding path program 1 times [2018-10-27 14:24:54,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:24:54,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:54,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:24:54,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:54,225 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:24:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:24:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:24:54,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:24:54,773 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:24:54,774 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 203 with the following transitions: [2018-10-27 14:24:54,776 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], [229], [231], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 14:24:54,841 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:24:54,842 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:24:55,404 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:24:55,455 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:24:55,457 INFO L272 AbstractInterpreter]: Visited 89 different actions 89 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 14:24:55,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:55,479 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:24:56,037 INFO L227 lantSequenceWeakener]: Weakened 193 states. On average, predicates are now at 77.8% of their original sizes. [2018-10-27 14:24:56,039 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:24:56,190 INFO L415 sIntCurrentIteration]: We unified 201 AI predicates to 201 [2018-10-27 14:24:56,190 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:24:56,191 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:24:56,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-10-27 14:24:56,191 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:24:56,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 14:24:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 14:24:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 14:24:56,193 INFO L87 Difference]: Start difference. First operand 1352 states and 2126 transitions. Second operand 7 states. [2018-10-27 14:26:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:26:59,064 INFO L93 Difference]: Finished difference Result 2883 states and 4473 transitions. [2018-10-27 14:26:59,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:26:59,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 202 [2018-10-27 14:26:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:26:59,073 INFO L225 Difference]: With dead ends: 2883 [2018-10-27 14:26:59,073 INFO L226 Difference]: Without dead ends: 1537 [2018-10-27 14:26:59,079 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:26:59,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2018-10-27 14:26:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1535. [2018-10-27 14:26:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2018-10-27 14:26:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2316 transitions. [2018-10-27 14:26:59,121 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2316 transitions. Word has length 202 [2018-10-27 14:26:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:26:59,122 INFO L481 AbstractCegarLoop]: Abstraction has 1535 states and 2316 transitions. [2018-10-27 14:26:59,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 14:26:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2316 transitions. [2018-10-27 14:26:59,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-10-27 14:26:59,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:26:59,128 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:26:59,129 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:26:59,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:26:59,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1751229010, now seen corresponding path program 1 times [2018-10-27 14:26:59,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:26:59,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:26:59,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:26:59,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:26:59,131 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:26:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:26:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 189 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:26:59,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:26:59,844 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:26:59,845 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 288 with the following transitions: [2018-10-27 14:26:59,845 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], [229], [231], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 14:26:59,851 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:26:59,852 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:26:59,955 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:27:00,083 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:27:00,084 INFO L272 AbstractInterpreter]: Visited 94 different actions 182 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 14:27:00,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:27:00,123 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:27:00,637 INFO L227 lantSequenceWeakener]: Weakened 38 states. On average, predicates are now at 77.63% of their original sizes. [2018-10-27 14:27:00,638 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:27:01,673 INFO L415 sIntCurrentIteration]: We unified 286 AI predicates to 286 [2018-10-27 14:27:01,673 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:27:01,674 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:27:01,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [12] total 29 [2018-10-27 14:27:01,674 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:27:01,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-27 14:27:01,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-27 14:27:01,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2018-10-27 14:27:01,676 INFO L87 Difference]: Start difference. First operand 1535 states and 2316 transitions. Second operand 19 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown