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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 22:33:41,600 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 22:33:41,602 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 22:33:41,617 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 22:33:41,618 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 22:33:41,619 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 22:33:41,621 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 22:33:41,623 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 22:33:41,625 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 22:33:41,625 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 22:33:41,626 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 22:33:41,626 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 22:33:41,629 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 22:33:41,630 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 22:33:41,633 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 22:33:41,634 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 22:33:41,635 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 22:33:41,637 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 22:33:41,639 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 22:33:41,640 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 22:33:41,641 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 22:33:41,643 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 22:33:41,645 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 22:33:41,652 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 22:33:41,652 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 22:33:41,653 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 22:33:41,654 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 22:33:41,654 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 22:33:41,669 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 22:33:41,669 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 22:33:41,670 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 22:33:41,670 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 22:33:41,671 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 22:33:41,671 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 22:33:41,671 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 22:33:41,671 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 22:33:41,671 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 22:33:41,672 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 22:33:41,672 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 22:33:41,672 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 22:33:41,673 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 22:33:41,673 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 22:33:41,673 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 22:33:41,673 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 22:33:41,674 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 22:33:41,674 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 22:33:41,674 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 22:33:41,674 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 22:33:41,674 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 22:33:41,675 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 22:33:41,675 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 22:33:41,675 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 22:33:41,675 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 22:33:41,676 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 22:33:41,676 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 22:33:41,676 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 22:33:41,676 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 22:33:41,676 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 22:33:41,676 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 22:33:41,677 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 22:33:41,677 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 22:33:41,677 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 22:33:41,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 22:33:41,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 22:33:41,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 22:33:41,739 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 22:33:41,739 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 22:33:41,740 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label54_true-unreach-call.c [2018-10-24 22:33:41,802 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a05b96c67/18d511dce8ba411aa0ae057324bcd123/FLAG8c17aa9f6 [2018-10-24 22:33:42,661 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 22:33:42,662 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label54_true-unreach-call.c [2018-10-24 22:33:42,718 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a05b96c67/18d511dce8ba411aa0ae057324bcd123/FLAG8c17aa9f6 [2018-10-24 22:33:42,741 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a05b96c67/18d511dce8ba411aa0ae057324bcd123 [2018-10-24 22:33:42,757 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 22:33:42,760 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 22:33:42,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 22:33:42,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 22:33:42,769 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 22:33:42,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:33:42" (1/1) ... [2018-10-24 22:33:42,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1986afa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:42, skipping insertion in model container [2018-10-24 22:33:42,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:33:42" (1/1) ... [2018-10-24 22:33:42,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 22:33:43,058 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 22:33:45,254 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 22:33:45,259 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 22:33:46,551 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 22:33:46,621 INFO L193 MainTranslator]: Completed translation [2018-10-24 22:33:46,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46 WrapperNode [2018-10-24 22:33:46,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 22:33:46,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 22:33:46,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 22:33:46,623 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 22:33:46,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (1/1) ... [2018-10-24 22:33:46,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (1/1) ... [2018-10-24 22:33:47,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 22:33:47,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 22:33:47,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 22:33:47,335 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 22:33:47,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (1/1) ... [2018-10-24 22:33:47,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (1/1) ... [2018-10-24 22:33:47,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (1/1) ... [2018-10-24 22:33:47,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (1/1) ... [2018-10-24 22:33:47,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (1/1) ... [2018-10-24 22:33:47,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (1/1) ... [2018-10-24 22:33:47,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (1/1) ... [2018-10-24 22:33:47,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 22:33:47,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 22:33:47,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 22:33:47,823 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 22:33:47,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (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 [2018-10-24 22:33:47,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 22:33:47,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 22:33:47,894 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2018-10-24 22:33:47,894 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2018-10-24 22:33:47,894 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2018-10-24 22:33:47,894 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2018-10-24 22:33:47,894 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 22:33:47,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 22:33:47,895 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 22:33:47,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 22:33:47,895 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 22:33:47,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 22:33:47,895 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 22:33:47,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 22:33:47,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 22:33:47,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 22:33:47,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 22:33:47,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 22:34:06,457 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 22:34:06,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:34:06 BoogieIcfgContainer [2018-10-24 22:34:06,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 22:34:06,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 22:34:06,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 22:34:06,463 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 22:34:06,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:33:42" (1/3) ... [2018-10-24 22:34:06,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e01cb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:34:06, skipping insertion in model container [2018-10-24 22:34:06,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:33:46" (2/3) ... [2018-10-24 22:34:06,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e01cb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:34:06, skipping insertion in model container [2018-10-24 22:34:06,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:34:06" (3/3) ... [2018-10-24 22:34:06,467 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label54_true-unreach-call.c [2018-10-24 22:34:06,478 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 22:34:06,489 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 22:34:06,508 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 22:34:06,562 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 22:34:06,563 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 22:34:06,563 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 22:34:06,563 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 22:34:06,563 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 22:34:06,563 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 22:34:06,563 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 22:34:06,564 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 22:34:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states. [2018-10-24 22:34:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-24 22:34:06,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:34:06,633 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] [2018-10-24 22:34:06,636 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:34:06,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:34:06,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2122689370, now seen corresponding path program 1 times [2018-10-24 22:34:06,644 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:34:06,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:34:06,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:34:06,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:34:06,704 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:34:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:34:07,167 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 22:34:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:34:07,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:34:07,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 22:34:07,283 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:34:07,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 22:34:07,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 22:34:07,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 22:34:07,308 INFO L87 Difference]: Start difference. First operand 1778 states. Second operand 3 states. [2018-10-24 22:34:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:34:22,622 INFO L93 Difference]: Finished difference Result 4998 states and 9417 transitions. [2018-10-24 22:34:22,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 22:34:22,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2018-10-24 22:34:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:34:22,674 INFO L225 Difference]: With dead ends: 4998 [2018-10-24 22:34:22,674 INFO L226 Difference]: Without dead ends: 3218 [2018-10-24 22:34:22,688 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 [2018-10-24 22:34:22,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2018-10-24 22:34:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 3215. [2018-10-24 22:34:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3215 states. [2018-10-24 22:34:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 5854 transitions. [2018-10-24 22:34:22,927 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 5854 transitions. Word has length 71 [2018-10-24 22:34:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:34:22,928 INFO L481 AbstractCegarLoop]: Abstraction has 3215 states and 5854 transitions. [2018-10-24 22:34:22,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 22:34:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 5854 transitions. [2018-10-24 22:34:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-24 22:34:22,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:34:22,946 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] [2018-10-24 22:34:22,946 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:34:22,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:34:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash 952822916, now seen corresponding path program 1 times [2018-10-24 22:34:22,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:34:22,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:34:22,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:34:22,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:34:22,951 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:34:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:34:23,302 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 22:34:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:34:23,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:34:23,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 22:34:23,681 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:34:23,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 22:34:23,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 22:34:23,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 22:34:23,685 INFO L87 Difference]: Start difference. First operand 3215 states and 5854 transitions. Second operand 6 states. [2018-10-24 22:34:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:34:52,251 INFO L93 Difference]: Finished difference Result 9340 states and 16946 transitions. [2018-10-24 22:34:52,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 22:34:52,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2018-10-24 22:34:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:34:52,285 INFO L225 Difference]: With dead ends: 9340 [2018-10-24 22:34:52,285 INFO L226 Difference]: Without dead ends: 6131 [2018-10-24 22:34:52,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 22:34:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2018-10-24 22:34:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 6091. [2018-10-24 22:34:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6091 states. [2018-10-24 22:34:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6091 states to 6091 states and 9637 transitions. [2018-10-24 22:34:52,461 INFO L78 Accepts]: Start accepts. Automaton has 6091 states and 9637 transitions. Word has length 143 [2018-10-24 22:34:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:34:52,462 INFO L481 AbstractCegarLoop]: Abstraction has 6091 states and 9637 transitions. [2018-10-24 22:34:52,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 22:34:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6091 states and 9637 transitions. [2018-10-24 22:34:52,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-24 22:34:52,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:34:52,470 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] [2018-10-24 22:34:52,471 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:34:52,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:34:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash 159779727, now seen corresponding path program 1 times [2018-10-24 22:34:52,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:34:52,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:34:52,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:34:52,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:34:52,473 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:34:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:34:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:34:52,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:34:52,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 22:34:52,981 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:34:52,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 22:34:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 22:34:52,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 22:34:52,982 INFO L87 Difference]: Start difference. First operand 6091 states and 9637 transitions. Second operand 6 states. [2018-10-24 22:35:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:35:19,144 INFO L93 Difference]: Finished difference Result 21091 states and 34228 transitions. [2018-10-24 22:35:19,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 22:35:19,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-10-24 22:35:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:35:19,215 INFO L225 Difference]: With dead ends: 21091 [2018-10-24 22:35:19,216 INFO L226 Difference]: Without dead ends: 15006 [2018-10-24 22:35:19,240 INFO L605 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 [2018-10-24 22:35:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15006 states. [2018-10-24 22:35:19,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15006 to 14817. [2018-10-24 22:35:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14817 states. [2018-10-24 22:35:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14817 states to 14817 states and 22424 transitions. [2018-10-24 22:35:19,618 INFO L78 Accepts]: Start accepts. Automaton has 14817 states and 22424 transitions. Word has length 145 [2018-10-24 22:35:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:35:19,619 INFO L481 AbstractCegarLoop]: Abstraction has 14817 states and 22424 transitions. [2018-10-24 22:35:19,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 22:35:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 14817 states and 22424 transitions. [2018-10-24 22:35:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-24 22:35:19,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:35:19,625 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] [2018-10-24 22:35:19,625 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:35:19,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:35:19,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1508483004, now seen corresponding path program 1 times [2018-10-24 22:35:19,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:35:19,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:35:19,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:35:19,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:35:19,627 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:35:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:35:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:35:19,949 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:35:19,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 22:35:19,950 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:35:19,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 22:35:19,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 22:35:19,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 22:35:19,951 INFO L87 Difference]: Start difference. First operand 14817 states and 22424 transitions. Second operand 5 states. [2018-10-24 22:35:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:35:50,692 INFO L93 Difference]: Finished difference Result 45430 states and 70748 transitions. [2018-10-24 22:35:50,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 22:35:50,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2018-10-24 22:35:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:35:50,812 INFO L225 Difference]: With dead ends: 45430 [2018-10-24 22:35:50,812 INFO L226 Difference]: Without dead ends: 30619 [2018-10-24 22:35:50,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 22:35:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30619 states. [2018-10-24 22:35:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30619 to 30149. [2018-10-24 22:35:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30149 states. [2018-10-24 22:35:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30149 states to 30149 states and 41658 transitions. [2018-10-24 22:35:51,564 INFO L78 Accepts]: Start accepts. Automaton has 30149 states and 41658 transitions. Word has length 176 [2018-10-24 22:35:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:35:51,565 INFO L481 AbstractCegarLoop]: Abstraction has 30149 states and 41658 transitions. [2018-10-24 22:35:51,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 22:35:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 30149 states and 41658 transitions. [2018-10-24 22:35:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-24 22:35:51,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:35:51,578 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 22:35:51,578 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:35:51,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:35:51,579 INFO L82 PathProgramCache]: Analyzing trace with hash -300329630, now seen corresponding path program 1 times [2018-10-24 22:35:51,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:35:51,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:35:51,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:35:51,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:35:51,580 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:35:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:35:51,815 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 22:35:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 128 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 22:35:52,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:35:52,217 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:35:52,218 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 243 with the following transitions: [2018-10-24 22:35:52,221 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5570], [5578], [5586], [5594], [5602], [5610], [5618], [5626], [5634], [5642], [5650], [5658], [5666], [5674], [5682], [5690], [5694], [5696], [5699], [5707], [5715], [5719], [5722], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5877], [6802], [6806], [6810], [6816], [6820], [6822], [6837], [6838], [6839], [6841], [6842] [2018-10-24 22:35:52,324 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 22:35:52,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:35:55,881 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 22:35:55,963 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 22:35:55,964 INFO L272 AbstractInterpreter]: Visited 104 different actions 104 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 22:35:55,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:35:55,980 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 22:35:58,673 INFO L232 lantSequenceWeakener]: Weakened 232 states. On average, predicates are now at 75.98% of their original sizes. [2018-10-24 22:35:58,673 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 22:35:59,147 INFO L413 sIntCurrentIteration]: We have 241 unified AI predicates [2018-10-24 22:35:59,148 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 22:35:59,149 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 22:35:59,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-10-24 22:35:59,149 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:35:59,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 22:35:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 22:35:59,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 22:35:59,151 INFO L87 Difference]: Start difference. First operand 30149 states and 41658 transitions. Second operand 7 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown