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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label41_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 12:05:17,107 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 12:05:17,109 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 12:05:17,122 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 12:05:17,123 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 12:05:17,124 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 12:05:17,125 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 12:05:17,127 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 12:05:17,129 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 12:05:17,130 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 12:05:17,131 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 12:05:17,131 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 12:05:17,132 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 12:05:17,133 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 12:05:17,134 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 12:05:17,135 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 12:05:17,136 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 12:05:17,138 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 12:05:17,140 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 12:05:17,142 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 12:05:17,143 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 12:05:17,145 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 12:05:17,147 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 12:05:17,148 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 12:05:17,148 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 12:05:17,149 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 12:05:17,150 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 12:05:17,151 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 12:05:17,152 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 12:05:17,153 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 12:05:17,153 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 12:05:17,154 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 12:05:17,157 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.epf [2018-11-07 12:05:17,174 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 12:05:17,174 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 12:05:17,175 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 12:05:17,176 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 12:05:17,176 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 12:05:17,176 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 12:05:17,176 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 12:05:17,176 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 12:05:17,177 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 12:05:17,177 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 12:05:17,177 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 12:05:17,177 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 12:05:17,178 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 12:05:17,178 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 12:05:17,178 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 12:05:17,179 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 12:05:17,179 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 12:05:17,179 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 12:05:17,179 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 12:05:17,179 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 12:05:17,180 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 12:05:17,180 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 12:05:17,180 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 12:05:17,180 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 12:05:17,181 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 12:05:17,181 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 12:05:17,181 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 12:05:17,181 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 12:05:17,181 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 12:05:17,182 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 12:05:17,182 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 12:05:17,182 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 12:05:17,182 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 12:05:17,182 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 12:05:17,227 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 12:05:17,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 12:05:17,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 12:05:17,248 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 12:05:17,249 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 12:05:17,250 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label41_false-unreach-call_false-termination.c [2018-11-07 12:05:17,314 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/709e36e3f/7b4e6f7e718a47bda17edd09fe8fcdc9/FLAG5a867ae34 [2018-11-07 12:05:18,017 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 12:05:18,024 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label41_false-unreach-call_false-termination.c [2018-11-07 12:05:18,042 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/709e36e3f/7b4e6f7e718a47bda17edd09fe8fcdc9/FLAG5a867ae34 [2018-11-07 12:05:18,061 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/709e36e3f/7b4e6f7e718a47bda17edd09fe8fcdc9 [2018-11-07 12:05:18,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 12:05:18,075 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 12:05:18,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 12:05:18,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 12:05:18,081 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 12:05:18,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:18,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4688d22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18, skipping insertion in model container [2018-11-07 12:05:18,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:18,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 12:05:18,156 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 12:05:18,726 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:05:18,732 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 12:05:18,921 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:05:18,939 INFO L193 MainTranslator]: Completed translation [2018-11-07 12:05:18,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18 WrapperNode [2018-11-07 12:05:18,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 12:05:18,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 12:05:18,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 12:05:18,941 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 12:05:18,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:18,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:19,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 12:05:19,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 12:05:19,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 12:05:19,099 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 12:05:19,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:19,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:19,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:19,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:19,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:19,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:19,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (1/1) ... [2018-11-07 12:05:19,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 12:05:19,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 12:05:19,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 12:05:19,217 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 12:05:19,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (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 12:05:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 12:05:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 12:05:19,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 12:05:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 12:05:19,296 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 12:05:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 12:05:19,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 12:05:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 12:05:19,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 12:05:23,062 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 12:05:23,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:05:23 BoogieIcfgContainer [2018-11-07 12:05:23,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 12:05:23,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 12:05:23,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 12:05:23,069 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 12:05:23,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:05:18" (1/3) ... [2018-11-07 12:05:23,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4e5728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:05:23, skipping insertion in model container [2018-11-07 12:05:23,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:05:18" (2/3) ... [2018-11-07 12:05:23,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4e5728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:05:23, skipping insertion in model container [2018-11-07 12:05:23,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:05:23" (3/3) ... [2018-11-07 12:05:23,073 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label41_false-unreach-call_false-termination.c [2018-11-07 12:05:23,083 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 12:05:23,092 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 12:05:23,109 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 12:05:23,152 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 12:05:23,152 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 12:05:23,152 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 12:05:23,152 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 12:05:23,153 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 12:05:23,153 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 12:05:23,153 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 12:05:23,153 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 12:05:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 12:05:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-07 12:05:23,192 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:05:23,193 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:05:23,196 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:05:23,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:05:23,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1981251204, now seen corresponding path program 1 times [2018-11-07 12:05:23,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:05:23,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:23,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:05:23,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:23,261 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:05:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:05:23,581 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 12:05:23,681 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 12:05:23,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:05:23,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 12:05:23,685 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:05:23,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 12:05:23,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 12:05:23,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:05:23,713 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 12:05:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:05:25,661 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 12:05:25,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 12:05:25,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-11-07 12:05:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:05:25,684 INFO L225 Difference]: With dead ends: 691 [2018-11-07 12:05:25,684 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 12:05:25,694 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 12:05:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 12:05:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 12:05:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 12:05:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 12:05:25,788 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 14 [2018-11-07 12:05:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:05:25,789 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 12:05:25,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 12:05:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 12:05:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-07 12:05:25,795 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:05:25,795 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:05:25,796 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:05:25,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:05:25,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1394388241, now seen corresponding path program 1 times [2018-11-07 12:05:25,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:05:25,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:25,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:05:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:25,799 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:05:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:05:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:05:26,203 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:05:26,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 12:05:26,203 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:05:26,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 12:05:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 12:05:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 12:05:26,207 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 12:05:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:05:28,252 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 12:05:28,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:05:28,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-11-07 12:05:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:05:28,265 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 12:05:28,265 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 12:05:28,269 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 12:05:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 12:05:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 12:05:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 12:05:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 12:05:28,322 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 101 [2018-11-07 12:05:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:05:28,323 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 12:05:28,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 12:05:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 12:05:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-07 12:05:28,326 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:05:28,327 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:05:28,327 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:05:28,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:05:28,328 INFO L82 PathProgramCache]: Analyzing trace with hash -425574092, now seen corresponding path program 1 times [2018-11-07 12:05:28,328 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:05:28,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:28,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:05:28,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:28,330 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:05:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:05:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:05:28,531 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:05:28,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 12:05:28,532 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:05:28,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 12:05:28,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 12:05:28,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:05:28,535 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 3 states. [2018-11-07 12:05:31,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:05:31,305 INFO L93 Difference]: Finished difference Result 1797 states and 3018 transitions. [2018-11-07 12:05:31,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 12:05:31,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2018-11-07 12:05:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:05:31,319 INFO L225 Difference]: With dead ends: 1797 [2018-11-07 12:05:31,322 INFO L226 Difference]: Without dead ends: 1178 [2018-11-07 12:05:31,329 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:05:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2018-11-07 12:05:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1178. [2018-11-07 12:05:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2018-11-07 12:05:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1732 transitions. [2018-11-07 12:05:31,384 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1732 transitions. Word has length 110 [2018-11-07 12:05:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:05:31,385 INFO L480 AbstractCegarLoop]: Abstraction has 1178 states and 1732 transitions. [2018-11-07 12:05:31,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 12:05:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1732 transitions. [2018-11-07 12:05:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-11-07 12:05:31,403 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:05:31,405 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:05:31,405 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:05:31,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:05:31,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1659653320, now seen corresponding path program 1 times [2018-11-07 12:05:31,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:05:31,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:31,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:05:31,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:31,408 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:05:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:05:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 12:05:31,651 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:05:31,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 12:05:31,652 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:05:31,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 12:05:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 12:05:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:05:31,653 INFO L87 Difference]: Start difference. First operand 1178 states and 1732 transitions. Second operand 3 states. [2018-11-07 12:05:33,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:05:33,284 INFO L93 Difference]: Finished difference Result 2903 states and 4462 transitions. [2018-11-07 12:05:33,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 12:05:33,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 214 [2018-11-07 12:05:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:05:33,296 INFO L225 Difference]: With dead ends: 2903 [2018-11-07 12:05:33,297 INFO L226 Difference]: Without dead ends: 1731 [2018-11-07 12:05:33,306 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 12:05:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-11-07 12:05:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-11-07 12:05:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-11-07 12:05:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2449 transitions. [2018-11-07 12:05:33,356 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2449 transitions. Word has length 214 [2018-11-07 12:05:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:05:33,357 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 2449 transitions. [2018-11-07 12:05:33,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 12:05:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2449 transitions. [2018-11-07 12:05:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-11-07 12:05:33,364 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:05:33,364 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:05:33,365 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:05:33,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:05:33,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1017345513, now seen corresponding path program 1 times [2018-11-07 12:05:33,365 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:05:33,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:33,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:05:33,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:05:33,367 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:05:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:05:33,872 WARN L179 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-07 12:05:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 14 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 12:05:34,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 12:05:34,541 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 12:05:34,542 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2018-11-07 12:05:34,545 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [638], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 12:05:34,601 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 12:05:34,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 12:05:35,689 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 12:05:46,081 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 12:05:46,083 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 12:05:46,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:05:46,130 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 12:05:55,376 INFO L227 lantSequenceWeakener]: Weakened 224 states. On average, predicates are now at 77.18% of their original sizes. [2018-11-07 12:05:55,377 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 12:05:55,590 INFO L415 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2018-11-07 12:05:55,593 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 12:05:55,594 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 12:05:55,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 12:05:55,594 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:05:55,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 12:05:55,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 12:05:55,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 12:05:55,595 INFO L87 Difference]: Start difference. First operand 1731 states and 2449 transitions. Second operand 7 states. [2018-11-07 12:09:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:09:15,015 INFO L93 Difference]: Finished difference Result 3641 states and 5191 transitions. [2018-11-07 12:09:15,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:09:15,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 233 [2018-11-07 12:09:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:09:15,025 INFO L225 Difference]: With dead ends: 3641 [2018-11-07 12:09:15,025 INFO L226 Difference]: Without dead ends: 1916 [2018-11-07 12:09:15,033 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 12:09:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2018-11-07 12:09:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1914. [2018-11-07 12:09:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1914 states. [2018-11-07 12:09:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2640 transitions. [2018-11-07 12:09:15,085 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2640 transitions. Word has length 233 [2018-11-07 12:09:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:09:15,085 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 2640 transitions. [2018-11-07 12:09:15,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 12:09:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2640 transitions. [2018-11-07 12:09:15,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-11-07 12:09:15,093 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:09:15,093 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 12:09:15,094 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:09:15,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:09:15,094 INFO L82 PathProgramCache]: Analyzing trace with hash 931974248, now seen corresponding path program 1 times [2018-11-07 12:09:15,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:09:15,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:09:15,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:09:15,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:09:15,096 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:09:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:09:15,600 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 12:09:15,798 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 12:09:16,016 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 12:09:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 109 proven. 183 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 12:09:16,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 12:09:16,473 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 12:09:16,473 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 319 with the following transitions: [2018-11-07 12:09:16,474 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [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], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 12:09:16,479 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 12:09:16,480 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 12:09:16,711 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-11-07 12:09:33,693 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 12:09:33,694 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 12:09:33,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:09:33,708 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates Cannot interrupt operation gracefully because timeout expired. Forcing shutdown