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_label49_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-24 02:27:59,557 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 02:27:59,559 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 02:27:59,571 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 02:27:59,571 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 02:27:59,573 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 02:27:59,574 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 02:27:59,576 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 02:27:59,577 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 02:27:59,578 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 02:27:59,579 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 02:27:59,579 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 02:27:59,580 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 02:27:59,581 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 02:27:59,582 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 02:27:59,583 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 02:27:59,584 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 02:27:59,586 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 02:27:59,590 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 02:27:59,592 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 02:27:59,598 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 02:27:59,600 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 02:27:59,604 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 02:27:59,618 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 02:27:59,620 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 02:27:59,621 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 02:27:59,622 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 02:27:59,622 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 02:27:59,654 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 02:27:59,654 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 02:27:59,655 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 02:27:59,655 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 02:27:59,655 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 02:27:59,656 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 02:27:59,658 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 02:27:59,658 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 02:27:59,658 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 02:27:59,658 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 02:27:59,659 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 02:27:59,659 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 02:27:59,661 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 02:27:59,661 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 02:27:59,661 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 02:27:59,662 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 02:27:59,662 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 02:27:59,662 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 02:27:59,662 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 02:27:59,662 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 02:27:59,663 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 02:27:59,664 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 02:27:59,664 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 02:27:59,664 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 02:27:59,665 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 02:27:59,665 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 02:27:59,665 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 02:27:59,665 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 02:27:59,665 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 02:27:59,666 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 02:27:59,666 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 02:27:59,666 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 02:27:59,666 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 02:27:59,666 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 02:27:59,726 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 02:27:59,741 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 02:27:59,746 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 02:27:59,747 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 02:27:59,748 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 02:27:59,748 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label49_true-unreach-call.c [2018-10-24 02:27:59,810 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3d7bdfeb1/b9de3c63152947059308720680dd517c/FLAGd3cca2701 [2018-10-24 02:28:00,674 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 02:28:00,675 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label49_true-unreach-call.c [2018-10-24 02:28:00,725 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3d7bdfeb1/b9de3c63152947059308720680dd517c/FLAGd3cca2701 [2018-10-24 02:28:00,744 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3d7bdfeb1/b9de3c63152947059308720680dd517c [2018-10-24 02:28:00,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 02:28:00,761 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 02:28:00,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 02:28:00,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 02:28:00,768 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 02:28:00,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:28:00" (1/1) ... [2018-10-24 02:28:00,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7897d110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:00, skipping insertion in model container [2018-10-24 02:28:00,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:28:00" (1/1) ... [2018-10-24 02:28:00,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 02:28:01,052 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 02:28:03,140 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 02:28:03,146 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 02:28:04,322 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 02:28:04,372 INFO L193 MainTranslator]: Completed translation [2018-10-24 02:28:04,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04 WrapperNode [2018-10-24 02:28:04,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 02:28:04,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 02:28:04,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 02:28:04,374 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 02:28:04,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (1/1) ... [2018-10-24 02:28:04,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (1/1) ... [2018-10-24 02:28:05,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 02:28:05,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 02:28:05,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 02:28:05,157 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 02:28:05,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (1/1) ... [2018-10-24 02:28:05,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (1/1) ... [2018-10-24 02:28:05,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (1/1) ... [2018-10-24 02:28:05,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (1/1) ... [2018-10-24 02:28:05,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (1/1) ... [2018-10-24 02:28:05,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (1/1) ... [2018-10-24 02:28:05,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (1/1) ... [2018-10-24 02:28:05,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 02:28:05,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 02:28:05,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 02:28:05,673 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 02:28:05,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (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 02:28:05,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 02:28:05,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 02:28:05,745 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2018-10-24 02:28:05,745 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2018-10-24 02:28:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2018-10-24 02:28:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2018-10-24 02:28:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 02:28:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 02:28:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 02:28:05,747 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 02:28:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 02:28:05,747 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 02:28:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 02:28:05,748 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 02:28:05,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 02:28:05,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 02:28:05,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 02:28:05,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 02:28:25,727 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 02:28:25,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:28:25 BoogieIcfgContainer [2018-10-24 02:28:25,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 02:28:25,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 02:28:25,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 02:28:25,732 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 02:28:25,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:28:00" (1/3) ... [2018-10-24 02:28:25,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74552167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:28:25, skipping insertion in model container [2018-10-24 02:28:25,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:04" (2/3) ... [2018-10-24 02:28:25,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74552167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:28:25, skipping insertion in model container [2018-10-24 02:28:25,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:28:25" (3/3) ... [2018-10-24 02:28:25,736 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label49_true-unreach-call.c [2018-10-24 02:28:25,746 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 02:28:25,756 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 02:28:25,775 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 02:28:25,839 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 02:28:25,839 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 02:28:25,839 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 02:28:25,839 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 02:28:25,840 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 02:28:25,840 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 02:28:25,840 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 02:28:25,840 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 02:28:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states. [2018-10-24 02:28:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-24 02:28:25,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:28:25,918 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] [2018-10-24 02:28:25,921 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:28:25,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:28:25,927 INFO L82 PathProgramCache]: Analyzing trace with hash 607797826, now seen corresponding path program 1 times [2018-10-24 02:28:25,929 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:28:25,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:28:25,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:28:25,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:28:25,975 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:28:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:28:26,452 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 02:28:26,576 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 02:28:26,579 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 02:28:26,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 02:28:26,579 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:28:26,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 02:28:26,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 02:28:26,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 02:28:26,606 INFO L87 Difference]: Start difference. First operand 1778 states. Second operand 3 states. [2018-10-24 02:28:44,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 02:28:44,925 INFO L93 Difference]: Finished difference Result 4998 states and 9417 transitions. [2018-10-24 02:28:44,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 02:28:44,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2018-10-24 02:28:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 02:28:44,971 INFO L225 Difference]: With dead ends: 4998 [2018-10-24 02:28:44,971 INFO L226 Difference]: Without dead ends: 3218 [2018-10-24 02:28:44,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 02:28:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2018-10-24 02:28:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 3215. [2018-10-24 02:28:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3215 states. [2018-10-24 02:28:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 5854 transitions. [2018-10-24 02:28:45,213 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 5854 transitions. Word has length 49 [2018-10-24 02:28:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 02:28:45,214 INFO L481 AbstractCegarLoop]: Abstraction has 3215 states and 5854 transitions. [2018-10-24 02:28:45,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 02:28:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 5854 transitions. [2018-10-24 02:28:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-24 02:28:45,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:28:45,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:45,225 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:28:45,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:28:45,226 INFO L82 PathProgramCache]: Analyzing trace with hash -539453364, now seen corresponding path program 1 times [2018-10-24 02:28:45,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:28:45,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:28:45,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:28:45,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:28:45,229 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:28:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:28:45,607 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 02:28:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 02:28:46,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 02:28:46,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 02:28:46,018 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:28:46,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 02:28:46,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 02:28:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 02:28:46,021 INFO L87 Difference]: Start difference. First operand 3215 states and 5854 transitions. Second operand 6 states. [2018-10-24 02:29:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 02:29:14,053 INFO L93 Difference]: Finished difference Result 10744 states and 19770 transitions. [2018-10-24 02:29:14,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 02:29:14,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2018-10-24 02:29:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 02:29:14,094 INFO L225 Difference]: With dead ends: 10744 [2018-10-24 02:29:14,094 INFO L226 Difference]: Without dead ends: 7535 [2018-10-24 02:29:14,107 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 02:29:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2018-10-24 02:29:14,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 7498. [2018-10-24 02:29:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7498 states. [2018-10-24 02:29:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7498 states to 7498 states and 12452 transitions. [2018-10-24 02:29:14,321 INFO L78 Accepts]: Start accepts. Automaton has 7498 states and 12452 transitions. Word has length 121 [2018-10-24 02:29:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 02:29:14,322 INFO L481 AbstractCegarLoop]: Abstraction has 7498 states and 12452 transitions. [2018-10-24 02:29:14,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 02:29:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 7498 states and 12452 transitions. [2018-10-24 02:29:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-24 02:29:14,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:29:14,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:14,326 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:29:14,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:29:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1062487657, now seen corresponding path program 1 times [2018-10-24 02:29:14,327 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:29:14,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:29:14,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:29:14,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:29:14,329 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:29:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:29:14,597 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 02:29:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 02:29:14,891 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 02:29:14,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 02:29:14,893 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:29:14,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 02:29:14,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 02:29:14,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 02:29:14,898 INFO L87 Difference]: Start difference. First operand 7498 states and 12452 transitions. Second operand 6 states. [2018-10-24 02:29:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 02:29:42,568 INFO L93 Difference]: Finished difference Result 23905 states and 40026 transitions. [2018-10-24 02:29:42,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 02:29:42,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2018-10-24 02:29:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 02:29:42,645 INFO L225 Difference]: With dead ends: 23905 [2018-10-24 02:29:42,646 INFO L226 Difference]: Without dead ends: 16413 [2018-10-24 02:29:42,675 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 02:29:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2018-10-24 02:29:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 16230. [2018-10-24 02:29:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16230 states. [2018-10-24 02:29:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16230 states to 16230 states and 25357 transitions. [2018-10-24 02:29:43,107 INFO L78 Accepts]: Start accepts. Automaton has 16230 states and 25357 transitions. Word has length 123 [2018-10-24 02:29:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 02:29:43,108 INFO L481 AbstractCegarLoop]: Abstraction has 16230 states and 25357 transitions. [2018-10-24 02:29:43,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 02:29:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 16230 states and 25357 transitions. [2018-10-24 02:29:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-24 02:29:43,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:29:43,113 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:43,113 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:29:43,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:29:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1488344396, now seen corresponding path program 1 times [2018-10-24 02:29:43,114 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:29:43,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:29:43,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:29:43,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:29:43,115 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:29:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:29:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 02:29:43,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 02:29:43,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 02:29:43,378 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:29:43,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 02:29:43,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 02:29:43,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 02:29:43,379 INFO L87 Difference]: Start difference. First operand 16230 states and 25357 transitions. Second operand 5 states. [2018-10-24 02:30:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 02:30:12,723 INFO L93 Difference]: Finished difference Result 48265 states and 76873 transitions. [2018-10-24 02:30:12,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 02:30:12,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2018-10-24 02:30:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 02:30:12,872 INFO L225 Difference]: With dead ends: 48265 [2018-10-24 02:30:12,873 INFO L226 Difference]: Without dead ends: 32041 [2018-10-24 02:30:12,920 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 [2018-10-24 02:30:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32041 states. [2018-10-24 02:30:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32041 to 31565. [2018-10-24 02:30:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31565 states. [2018-10-24 02:30:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31565 states to 31565 states and 43757 transitions. [2018-10-24 02:30:13,596 INFO L78 Accepts]: Start accepts. Automaton has 31565 states and 43757 transitions. Word has length 154 [2018-10-24 02:30:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 02:30:13,597 INFO L481 AbstractCegarLoop]: Abstraction has 31565 states and 43757 transitions. [2018-10-24 02:30:13,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 02:30:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 31565 states and 43757 transitions. [2018-10-24 02:30:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-24 02:30:13,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 02:30:13,612 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, 2, 2, 2, 2, 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] [2018-10-24 02:30:13,612 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 02:30:13,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:30:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash 664970826, now seen corresponding path program 1 times [2018-10-24 02:30:13,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 02:30:13,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:30:13,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 02:30:13,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 02:30:13,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 02:30:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 02:30:13,955 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 02:30:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 84 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 02:30:14,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 02:30:14,355 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 02:30:14,357 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 221 with the following transitions: [2018-10-24 02:30:14,359 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], [5518], [5520], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [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 02:30:14,428 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 02:30:14,429 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 02:30:18,085 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 02:30:18,120 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 02:30:18,121 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 02:30:18,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 02:30:18,134 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 02:30:20,403 INFO L232 lantSequenceWeakener]: Weakened 210 states. On average, predicates are now at 75.65% of their original sizes. [2018-10-24 02:30:20,403 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 02:30:20,847 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 02:30:20,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 02:30:20,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-10-24 02:30:20,849 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 02:30:20,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 02:30:20,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 02:30:20,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 02:30:20,850 INFO L87 Difference]: Start difference. First operand 31565 states and 43757 transitions. Second operand 7 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown