java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label56_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:05:31,717 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:05:31,719 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:05:31,739 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:05:31,739 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:05:31,741 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:05:31,742 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:05:31,745 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:05:31,747 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:05:31,755 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:05:31,756 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:05:31,756 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:05:31,759 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:05:31,762 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:05:31,763 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:05:31,764 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:05:31,766 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:05:31,770 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:05:31,773 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:05:31,775 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:05:31,777 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:05:31,779 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:05:31,783 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:05:31,783 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:05:31,783 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:05:31,784 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:05:31,785 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:05:31,786 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:05:31,788 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:05:31,790 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:05:31,790 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:05:31,791 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:05:31,791 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:05:31,791 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:05:31,793 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:05:31,794 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:05:31,795 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 20:05:31,819 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:05:31,819 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:05:31,820 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:05:31,821 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:05:31,821 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:05:31,821 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:05:31,821 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:05:31,821 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:05:31,821 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:05:31,822 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:05:31,822 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:05:31,822 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:05:31,822 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:05:31,823 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:05:31,823 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:05:31,824 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:05:31,824 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:05:31,824 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:05:31,824 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:05:31,824 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:05:31,824 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:05:31,825 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:05:31,826 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:05:31,826 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:05:31,826 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:05:31,826 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:05:31,826 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:05:31,827 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:05:31,827 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:05:31,827 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:05:31,827 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:05:31,827 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:05:31,827 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:05:31,828 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:05:31,828 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:05:31,881 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:05:31,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:05:31,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:05:31,908 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:05:31,908 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:05:31,909 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label56_true-unreach-call.c [2018-11-07 20:05:31,967 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ae4879c/723e6b1179324f5b8726381a8e6175ac/FLAG5ece9efa5 [2018-11-07 20:05:32,517 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:05:32,518 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label56_true-unreach-call.c [2018-11-07 20:05:32,533 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ae4879c/723e6b1179324f5b8726381a8e6175ac/FLAG5ece9efa5 [2018-11-07 20:05:32,560 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ae4879c/723e6b1179324f5b8726381a8e6175ac [2018-11-07 20:05:32,572 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:05:32,575 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:05:32,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:05:32,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:05:32,582 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:05:32,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:05:32" (1/1) ... [2018-11-07 20:05:32,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ede86bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:32, skipping insertion in model container [2018-11-07 20:05:32,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:05:32" (1/1) ... [2018-11-07 20:05:32,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:05:32,662 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:05:33,140 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:05:33,145 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:05:33,329 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:05:33,349 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:05:33,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33 WrapperNode [2018-11-07 20:05:33,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:05:33,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:05:33,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:05:33,351 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:05:33,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... [2018-11-07 20:05:33,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... [2018-11-07 20:05:33,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:05:33,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:05:33,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:05:33,490 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:05:33,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... [2018-11-07 20:05:33,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... [2018-11-07 20:05:33,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... [2018-11-07 20:05:33,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... [2018-11-07 20:05:33,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... [2018-11-07 20:05:33,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... [2018-11-07 20:05:33,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... [2018-11-07 20:05:33,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:05:33,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:05:33,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:05:33,612 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:05:33,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:05:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:05:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:05:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:05:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:05:33,689 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:05:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:05:33,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:05:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:05:33,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:05:36,861 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:05:36,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:05:36 BoogieIcfgContainer [2018-11-07 20:05:36,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:05:36,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:05:36,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:05:36,867 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:05:36,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:05:32" (1/3) ... [2018-11-07 20:05:36,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d40ee16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:05:36, skipping insertion in model container [2018-11-07 20:05:36,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:05:33" (2/3) ... [2018-11-07 20:05:36,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d40ee16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:05:36, skipping insertion in model container [2018-11-07 20:05:36,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:05:36" (3/3) ... [2018-11-07 20:05:36,871 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label56_true-unreach-call.c [2018-11-07 20:05:36,881 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:05:36,889 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:05:36,903 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:05:36,942 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:05:36,942 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:05:36,942 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:05:36,943 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:05:36,943 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:05:36,943 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:05:36,943 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:05:36,944 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:05:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-11-07 20:05:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-07 20:05:36,986 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:05:36,987 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:05:36,990 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:05:36,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:05:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1189398212, now seen corresponding path program 1 times [2018-11-07 20:05:37,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:05:37,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:05:37,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:05:37,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:05:37,051 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:05:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:05:37,462 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:05:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:05:37,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:05:37,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 20:05:37,536 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:05:37,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:05:37,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:05:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:05:37,562 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-11-07 20:05:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:05:39,126 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-11-07 20:05:39,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:05:39,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2018-11-07 20:05:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:05:39,148 INFO L225 Difference]: With dead ends: 574 [2018-11-07 20:05:39,148 INFO L226 Difference]: Without dead ends: 356 [2018-11-07 20:05:39,156 INFO L604 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 [2018-11-07 20:05:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-11-07 20:05:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-11-07 20:05:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-11-07 20:05:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 607 transitions. [2018-11-07 20:05:39,232 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 607 transitions. Word has length 30 [2018-11-07 20:05:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:05:39,233 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 607 transitions. [2018-11-07 20:05:39,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:05:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 607 transitions. [2018-11-07 20:05:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-07 20:05:39,240 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:05:39,241 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:05:39,241 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:05:39,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:05:39,242 INFO L82 PathProgramCache]: Analyzing trace with hash 536301288, now seen corresponding path program 1 times [2018-11-07 20:05:39,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:05:39,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:05:39,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:05:39,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:05:39,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:05:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:05:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 20:05:39,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:05:39,599 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:05:39,600 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 119 with the following transitions: [2018-11-07 20:05:39,602 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [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], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 20:05:39,655 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:05:39,655 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:05:40,265 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:05:40,267 INFO L272 AbstractInterpreter]: Visited 92 different actions 92 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 20:05:40,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:05:40,288 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:05:40,767 INFO L227 lantSequenceWeakener]: Weakened 112 states. On average, predicates are now at 72.97% of their original sizes. [2018-11-07 20:05:40,767 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:05:40,974 INFO L415 sIntCurrentIteration]: We unified 117 AI predicates to 117 [2018-11-07 20:05:40,974 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:05:40,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:05:40,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2018-11-07 20:05:40,976 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:05:40,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:05:40,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:05:40,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:05:40,979 INFO L87 Difference]: Start difference. First operand 356 states and 607 transitions. Second operand 7 states. [2018-11-07 20:05:43,102 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:05:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:05:53,949 INFO L93 Difference]: Finished difference Result 852 states and 1471 transitions. [2018-11-07 20:05:53,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:05:53,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2018-11-07 20:05:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:05:53,954 INFO L225 Difference]: With dead ends: 852 [2018-11-07 20:05:53,954 INFO L226 Difference]: Without dead ends: 502 [2018-11-07 20:05:53,957 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:05:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2018-11-07 20:05:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 500. [2018-11-07 20:05:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2018-11-07 20:05:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 757 transitions. [2018-11-07 20:05:54,000 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 757 transitions. Word has length 118 [2018-11-07 20:05:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:05:54,001 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 757 transitions. [2018-11-07 20:05:54,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:05:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 757 transitions. [2018-11-07 20:05:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-07 20:05:54,006 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:05:54,007 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:05:54,007 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:05:54,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:05:54,008 INFO L82 PathProgramCache]: Analyzing trace with hash -524938665, now seen corresponding path program 1 times [2018-11-07 20:05:54,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:05:54,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:05:54,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:05:54,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:05:54,009 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:05:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:05:54,452 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:05:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-07 20:05:54,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:05:54,768 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:05:54,769 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 190 with the following transitions: [2018-11-07 20:05:54,769 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [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], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 20:05:54,778 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:05:54,778 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:05:54,895 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:05:55,222 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:05:55,223 INFO L272 AbstractInterpreter]: Visited 96 different actions 276 times. Merged at 5 different actions 10 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:05:55,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:05:55,254 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:05:55,804 INFO L227 lantSequenceWeakener]: Weakened 36 states. On average, predicates are now at 75.26% of their original sizes. [2018-11-07 20:05:55,805 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:05:57,165 INFO L415 sIntCurrentIteration]: We unified 188 AI predicates to 188 [2018-11-07 20:05:57,165 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:05:57,166 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:05:57,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [4] total 23 [2018-11-07 20:05:57,166 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:05:57,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 20:05:57,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 20:05:57,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:05:57,171 INFO L87 Difference]: Start difference. First operand 500 states and 757 transitions. Second operand 21 states. [2018-11-07 20:06:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:06:16,318 INFO L93 Difference]: Finished difference Result 1312 states and 2191 transitions. [2018-11-07 20:06:16,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-07 20:06:16,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 189 [2018-11-07 20:06:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:06:16,325 INFO L225 Difference]: With dead ends: 1312 [2018-11-07 20:06:16,325 INFO L226 Difference]: Without dead ends: 962 [2018-11-07 20:06:16,327 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2018-11-07 20:06:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2018-11-07 20:06:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 798. [2018-11-07 20:06:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2018-11-07 20:06:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1084 transitions. [2018-11-07 20:06:16,367 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1084 transitions. Word has length 189 [2018-11-07 20:06:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:06:16,368 INFO L480 AbstractCegarLoop]: Abstraction has 798 states and 1084 transitions. [2018-11-07 20:06:16,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 20:06:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1084 transitions. [2018-11-07 20:06:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-11-07 20:06:16,374 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:06:16,374 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:06:16,375 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:06:16,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:06:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1669427612, now seen corresponding path program 1 times [2018-11-07 20:06:16,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:06:16,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:16,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:06:16,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:16,377 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:06:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:06:16,654 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:06:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 20:06:16,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:06:16,741 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:06:16,742 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 199 with the following transitions: [2018-11-07 20:06:16,742 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [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], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 20:06:16,746 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:06:16,746 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:06:16,810 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:06:17,020 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:06:17,021 INFO L272 AbstractInterpreter]: Visited 97 different actions 378 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 20:06:17,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:06:17,026 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:06:17,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:06:17,026 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:06:17,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:06:17,037 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:06:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:06:17,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:06:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:06:17,684 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:06:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:06:18,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:06:18,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2018-11-07 20:06:18,671 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:06:18,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:06:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:06:18,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-07 20:06:18,673 INFO L87 Difference]: Start difference. First operand 798 states and 1084 transitions. Second operand 11 states. [2018-11-07 20:06:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:06:24,926 INFO L93 Difference]: Finished difference Result 2481 states and 3995 transitions. [2018-11-07 20:06:24,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-07 20:06:24,927 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 198 [2018-11-07 20:06:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:06:24,936 INFO L225 Difference]: With dead ends: 2481 [2018-11-07 20:06:24,937 INFO L226 Difference]: Without dead ends: 1481 [2018-11-07 20:06:24,946 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 400 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-11-07 20:06:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2018-11-07 20:06:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1332. [2018-11-07 20:06:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2018-11-07 20:06:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1605 transitions. [2018-11-07 20:06:25,000 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1605 transitions. Word has length 198 [2018-11-07 20:06:25,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:06:25,000 INFO L480 AbstractCegarLoop]: Abstraction has 1332 states and 1605 transitions. [2018-11-07 20:06:25,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:06:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1605 transitions. [2018-11-07 20:06:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-11-07 20:06:25,006 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:06:25,007 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:06:25,007 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:06:25,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:06:25,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1270182200, now seen corresponding path program 1 times [2018-11-07 20:06:25,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:06:25,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:25,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:06:25,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:06:25,009 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:06:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:06:26,166 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-11-07 20:06:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 20:06:26,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:06:26,234 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:06:26,234 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 289 with the following transitions: [2018-11-07 20:06:26,235 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [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], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [782], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 20:06:26,242 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:06:26,243 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:06:26,398 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:06:26,915 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:06:26,915 INFO L272 AbstractInterpreter]: Visited 151 different actions 443 times. Merged at 7 different actions 14 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:06:26,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:06:26,951 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:06:26,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:06:26,951 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:06:26,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:06:26,971 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:06:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:06:27,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:06:28,126 WARN L179 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 20 [2018-11-07 20:06:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 5 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:06:28,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:06:28,857 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 20:06:29,448 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-11-07 20:06:31,234 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 1670