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/Problem11_label31_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:12:24,135 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:12:24,137 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:12:24,152 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:12:24,152 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:12:24,154 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:12:24,156 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:12:24,160 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:12:24,162 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:12:24,163 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:12:24,164 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:12:24,164 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:12:24,169 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:12:24,170 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:12:24,173 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:12:24,174 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:12:24,175 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:12:24,183 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:12:24,185 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:12:24,186 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:12:24,188 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:12:24,189 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:12:24,192 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:12:24,193 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:12:24,193 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:12:24,194 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:12:24,198 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:12:24,199 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:12:24,199 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:12:24,200 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:12:24,201 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:12:24,201 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:12:24,201 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:12:24,204 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:12:24,205 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:12:24,205 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:12:24,206 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 [2018-11-12 16:12:24,231 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:12:24,231 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:12:24,237 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:12:24,237 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:12:24,238 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:12:24,238 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:12:24,238 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:12:24,238 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:12:24,239 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:12:24,239 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:12:24,239 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:12:24,239 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:12:24,239 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:12:24,240 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:12:24,240 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:12:24,241 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:12:24,241 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:12:24,241 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:12:24,241 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:12:24,241 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:12:24,242 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:12:24,242 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:12:24,242 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:12:24,242 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:12:24,242 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:12:24,243 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:12:24,243 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:12:24,243 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:12:24,243 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:12:24,244 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:12:24,244 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:12:24,244 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:12:24,244 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:12:24,244 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:12:24,245 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:12:24,314 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:12:24,327 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:12:24,331 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:12:24,333 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:12:24,333 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:12:24,334 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label31_false-unreach-call.c [2018-11-12 16:12:24,387 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dc8d575f/582ef0c1ecc34aacaf3c9f01466f2c7a/FLAG5c601cfa2 [2018-11-12 16:12:25,052 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:12:25,054 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label31_false-unreach-call.c [2018-11-12 16:12:25,073 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dc8d575f/582ef0c1ecc34aacaf3c9f01466f2c7a/FLAG5c601cfa2 [2018-11-12 16:12:25,093 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dc8d575f/582ef0c1ecc34aacaf3c9f01466f2c7a [2018-11-12 16:12:25,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:12:25,108 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:12:25,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:12:25,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:12:25,114 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:12:25,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:12:25" (1/1) ... [2018-11-12 16:12:25,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5831b744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:25, skipping insertion in model container [2018-11-12 16:12:25,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:12:25" (1/1) ... [2018-11-12 16:12:25,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:12:25,214 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:12:25,891 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:12:25,896 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:12:26,102 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:12:26,124 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:12:26,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26 WrapperNode [2018-11-12 16:12:26,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:12:26,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:12:26,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:12:26,127 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:12:26,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (1/1) ... [2018-11-12 16:12:26,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (1/1) ... [2018-11-12 16:12:26,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:12:26,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:12:26,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:12:26,274 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:12:26,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (1/1) ... [2018-11-12 16:12:26,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (1/1) ... [2018-11-12 16:12:26,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (1/1) ... [2018-11-12 16:12:26,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (1/1) ... [2018-11-12 16:12:26,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (1/1) ... [2018-11-12 16:12:26,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (1/1) ... [2018-11-12 16:12:26,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (1/1) ... [2018-11-12 16:12:26,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:12:26,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:12:26,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:12:26,381 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:12:26,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (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 [2018-11-12 16:12:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:12:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:12:26,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:12:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:12:26,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:12:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:12:26,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:12:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:12:26,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:12:30,677 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:12:30,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:12:30 BoogieIcfgContainer [2018-11-12 16:12:30,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:12:30,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:12:30,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:12:30,682 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:12:30,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:12:25" (1/3) ... [2018-11-12 16:12:30,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1126213b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:12:30, skipping insertion in model container [2018-11-12 16:12:30,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:12:26" (2/3) ... [2018-11-12 16:12:30,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1126213b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:12:30, skipping insertion in model container [2018-11-12 16:12:30,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:12:30" (3/3) ... [2018-11-12 16:12:30,686 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label31_false-unreach-call.c [2018-11-12 16:12:30,697 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:12:30,706 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:12:30,722 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:12:30,762 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:12:30,762 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:12:30,762 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:12:30,763 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:12:30,763 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:12:30,763 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:12:30,763 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:12:30,763 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:12:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 16:12:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-12 16:12:30,799 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:12:30,801 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:12:30,803 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:12:30,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1380418692, now seen corresponding path program 1 times [2018-11-12 16:12:30,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:12:30,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:30,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:12:30,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:30,861 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:12:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:12:31,238 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:12:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:12:31,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:12:31,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 16:12:31,323 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:12:31,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:12:31,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:12:31,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:12:31,342 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-11-12 16:12:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:12:33,535 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-11-12 16:12:33,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:12:33,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-11-12 16:12:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:12:33,560 INFO L225 Difference]: With dead ends: 782 [2018-11-12 16:12:33,560 INFO L226 Difference]: Without dead ends: 487 [2018-11-12 16:12:33,569 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 [2018-11-12 16:12:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-11-12 16:12:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-11-12 16:12:33,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-11-12 16:12:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-11-12 16:12:33,661 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 14 [2018-11-12 16:12:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:12:33,661 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-11-12 16:12:33,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:12:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-11-12 16:12:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-12 16:12:33,667 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:12:33,667 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] [2018-11-12 16:12:33,668 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:12:33,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:33,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1196080591, now seen corresponding path program 1 times [2018-11-12 16:12:33,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:12:33,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:33,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:12:33,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:33,671 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:12:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:12:34,325 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:12:34,715 WARN L179 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-11-12 16:12:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:12:34,805 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:12:34,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 16:12:34,806 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:12:34,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:12:34,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:12:34,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:12:34,811 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-11-12 16:12:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:12:40,829 INFO L93 Difference]: Finished difference Result 1755 states and 3230 transitions. [2018-11-12 16:12:40,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 16:12:40,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2018-11-12 16:12:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:12:40,848 INFO L225 Difference]: With dead ends: 1755 [2018-11-12 16:12:40,849 INFO L226 Difference]: Without dead ends: 1279 [2018-11-12 16:12:40,855 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:12:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2018-11-12 16:12:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1033. [2018-11-12 16:12:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2018-11-12 16:12:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1679 transitions. [2018-11-12 16:12:40,962 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1679 transitions. Word has length 89 [2018-11-12 16:12:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:12:40,963 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 1679 transitions. [2018-11-12 16:12:40,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:12:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1679 transitions. [2018-11-12 16:12:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-12 16:12:40,971 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:12:40,971 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:12:40,971 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:12:40,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash -669093568, now seen corresponding path program 1 times [2018-11-12 16:12:40,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:12:40,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:40,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:12:40,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:40,974 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:12:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:12:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:12:41,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:12:41,273 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:12:41,273 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 163 with the following transitions: [2018-11-12 16:12:41,276 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], [506], [507], [511], [514], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:12:41,322 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:12:41,323 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:12:41,761 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:12:41,763 INFO L272 AbstractInterpreter]: Visited 80 different actions 80 times. Never merged. Never widened. Performed 824 root evaluator evaluations with a maximum evaluation depth of 6. Performed 824 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 28 variables. [2018-11-12 16:12:41,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:41,806 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:12:42,290 INFO L227 lantSequenceWeakener]: Weakened 153 states. On average, predicates are now at 72.78% of their original sizes. [2018-11-12 16:12:42,291 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:12:42,629 INFO L415 sIntCurrentIteration]: We unified 161 AI predicates to 161 [2018-11-12 16:12:42,629 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:12:42,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:12:42,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-12 16:12:42,630 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:12:42,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:12:42,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:12:42,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:12:42,632 INFO L87 Difference]: Start difference. First operand 1033 states and 1679 transitions. Second operand 7 states. [2018-11-12 16:12:46,206 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:12:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:12:58,378 INFO L93 Difference]: Finished difference Result 2252 states and 3562 transitions. [2018-11-12 16:12:58,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:12:58,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2018-11-12 16:12:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:12:58,385 INFO L225 Difference]: With dead ends: 2252 [2018-11-12 16:12:58,385 INFO L226 Difference]: Without dead ends: 1225 [2018-11-12 16:12:58,388 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:12:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2018-11-12 16:12:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1223. [2018-11-12 16:12:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1223 states. [2018-11-12 16:12:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1877 transitions. [2018-11-12 16:12:58,420 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1877 transitions. Word has length 162 [2018-11-12 16:12:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:12:58,421 INFO L480 AbstractCegarLoop]: Abstraction has 1223 states and 1877 transitions. [2018-11-12 16:12:58,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:12:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1877 transitions. [2018-11-12 16:12:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-11-12 16:12:58,424 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:12:58,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:12:58,425 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:12:58,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1475705382, now seen corresponding path program 1 times [2018-11-12 16:12:58,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:12:58,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:58,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:12:58,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:58,427 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:12:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:12:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:12:58,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:12:58,869 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:12:58,869 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2018-11-12 16:12:58,869 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], [514], [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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:12:58,878 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:12:58,878 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:12:59,005 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:12:59,249 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:12:59,250 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Performed 3009 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3009 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 16:12:59,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:59,277 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:12:59,684 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 72.91% of their original sizes. [2018-11-12 16:12:59,685 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:13:00,230 INFO L415 sIntCurrentIteration]: We unified 205 AI predicates to 205 [2018-11-12 16:13:00,230 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:13:00,231 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:13:00,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2018-11-12 16:13:00,231 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:13:00,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 16:13:00,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 16:13:00,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 16:13:00,232 INFO L87 Difference]: Start difference. First operand 1223 states and 1877 transitions. Second operand 11 states. [2018-11-12 16:13:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:13:15,821 INFO L93 Difference]: Finished difference Result 2445 states and 3917 transitions. [2018-11-12 16:13:15,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 16:13:15,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 206 [2018-11-12 16:13:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:13:15,830 INFO L225 Difference]: With dead ends: 2445 [2018-11-12 16:13:15,830 INFO L226 Difference]: Without dead ends: 1418 [2018-11-12 16:13:15,834 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 214 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:13:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2018-11-12 16:13:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1414. [2018-11-12 16:13:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2018-11-12 16:13:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 2084 transitions. [2018-11-12 16:13:15,870 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 2084 transitions. Word has length 206 [2018-11-12 16:13:15,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:13:15,870 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 2084 transitions. [2018-11-12 16:13:15,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 16:13:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 2084 transitions. [2018-11-12 16:13:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-11-12 16:13:15,874 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:13:15,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:13:15,874 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:13:15,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:13:15,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1225192974, now seen corresponding path program 1 times [2018-11-12 16:13:15,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:13:15,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:13:15,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:13:15,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:13:15,876 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:13:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:13:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 16:13:16,062 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:13:16,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 16:13:16,062 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:13:16,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:13:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:13:16,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:13:16,064 INFO L87 Difference]: Start difference. First operand 1414 states and 2084 transitions. Second operand 3 states. [2018-11-12 16:13:17,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:13:17,227 INFO L93 Difference]: Finished difference Result 3193 states and 5147 transitions. [2018-11-12 16:13:17,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:13:17,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2018-11-12 16:13:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:13:17,241 INFO L225 Difference]: With dead ends: 3193 [2018-11-12 16:13:17,242 INFO L226 Difference]: Without dead ends: 2166 [2018-11-12 16:13:17,247 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 [2018-11-12 16:13:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2018-11-12 16:13:17,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 1987. [2018-11-12 16:13:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1987 states. [2018-11-12 16:13:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2801 transitions. [2018-11-12 16:13:17,299 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2801 transitions. Word has length 216 [2018-11-12 16:13:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:13:17,300 INFO L480 AbstractCegarLoop]: Abstraction has 1987 states and 2801 transitions. [2018-11-12 16:13:17,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:13:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2801 transitions. [2018-11-12 16:13:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-11-12 16:13:17,303 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:13:17,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:13:17,304 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:13:17,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:13:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash -612296166, now seen corresponding path program 1 times [2018-11-12 16:13:17,304 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:13:17,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:13:17,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:13:17,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:13:17,305 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:13:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:13:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:13:17,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:13:17,800 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:13:17,800 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 217 with the following transitions: [2018-11-12 16:13:17,801 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], [514], [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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:13:17,806 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:13:17,806 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:13:17,934 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:13:18,499 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:13:18,500 INFO L272 AbstractInterpreter]: Visited 135 different actions 392 times. Merged at 5 different actions 9 times. Never widened. Performed 5080 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5080 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 16:13:18,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:13:18,529 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:13:18,838 INFO L227 lantSequenceWeakener]: Weakened 213 states. On average, predicates are now at 72.92% of their original sizes. [2018-11-12 16:13:18,838 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:13:19,038 INFO L415 sIntCurrentIteration]: We unified 215 AI predicates to 215 [2018-11-12 16:13:19,038 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:13:19,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:13:19,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2018-11-12 16:13:19,039 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:13:19,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 16:13:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 16:13:19,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 16:13:19,041 INFO L87 Difference]: Start difference. First operand 1987 states and 2801 transitions. Second operand 11 states. [2018-11-12 16:13:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:13:29,745 INFO L93 Difference]: Finished difference Result 3978 states and 5940 transitions. [2018-11-12 16:13:29,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:13:29,745 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 216 [2018-11-12 16:13:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:13:29,756 INFO L225 Difference]: With dead ends: 3978 [2018-11-12 16:13:29,757 INFO L226 Difference]: Without dead ends: 2378 [2018-11-12 16:13:29,763 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 225 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:13:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2018-11-12 16:13:29,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2372. [2018-11-12 16:13:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2372 states. [2018-11-12 16:13:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3243 transitions. [2018-11-12 16:13:29,817 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3243 transitions. Word has length 216 [2018-11-12 16:13:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:13:29,818 INFO L480 AbstractCegarLoop]: Abstraction has 2372 states and 3243 transitions. [2018-11-12 16:13:29,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 16:13:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3243 transitions. [2018-11-12 16:13:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-11-12 16:13:29,822 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:13:29,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:13:29,822 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:13:29,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:13:29,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1093129036, now seen corresponding path program 1 times [2018-11-12 16:13:29,823 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:13:29,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:13:29,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:13:29,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:13:29,824 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:13:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:13:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:13:30,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:13:30,323 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:13:30,324 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 222 with the following transitions: [2018-11-12 16:13:30,324 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], [514], [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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:13:30,331 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:13:30,332 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:13:30,499 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:13:31,537 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:13:31,537 INFO L272 AbstractInterpreter]: Visited 140 different actions 407 times. Merged at 5 different actions 9 times. Never widened. Performed 7675 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7675 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 16:13:31,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:13:31,541 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:13:31,819 INFO L227 lantSequenceWeakener]: Weakened 218 states. On average, predicates are now at 72.97% of their original sizes. [2018-11-12 16:13:31,819 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:13:32,073 INFO L415 sIntCurrentIteration]: We unified 220 AI predicates to 220 [2018-11-12 16:13:32,073 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:13:32,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:13:32,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2018-11-12 16:13:32,073 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:13:32,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 16:13:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 16:13:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-12 16:13:32,075 INFO L87 Difference]: Start difference. First operand 2372 states and 3243 transitions. Second operand 13 states. [2018-11-12 16:13:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:13:50,983 INFO L93 Difference]: Finished difference Result 4368 states and 6220 transitions. [2018-11-12 16:13:50,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:13:50,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 221 [2018-11-12 16:13:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:13:50,995 INFO L225 Difference]: With dead ends: 4368 [2018-11-12 16:13:50,995 INFO L226 Difference]: Without dead ends: 2768 [2018-11-12 16:13:51,001 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 230 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-12 16:13:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2018-11-12 16:13:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2762. [2018-11-12 16:13:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2762 states. [2018-11-12 16:13:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 3656 transitions. [2018-11-12 16:13:51,061 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 3656 transitions. Word has length 221 [2018-11-12 16:13:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:13:51,062 INFO L480 AbstractCegarLoop]: Abstraction has 2762 states and 3656 transitions. [2018-11-12 16:13:51,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-12 16:13:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 3656 transitions. [2018-11-12 16:13:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-12 16:13:51,067 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:13:51,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:13:51,067 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:13:51,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:13:51,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1769082423, now seen corresponding path program 1 times [2018-11-12 16:13:51,068 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:13:51,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:13:51,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:13:51,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:13:51,069 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:13:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:13:51,592 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-12 16:13:51,946 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-12 16:13:52,192 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-12 16:13:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:13:52,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:13:52,860 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:13:52,860 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2018-11-12 16:13:52,861 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], [514], [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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:13:52,865 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:13:52,865 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:13:52,969 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:13:53,450 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:13:53,450 INFO L272 AbstractInterpreter]: Visited 156 different actions 455 times. Merged at 5 different actions 9 times. Never widened. Performed 8633 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8633 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 16:13:53,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:13:53,457 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:13:53,925 INFO L227 lantSequenceWeakener]: Weakened 23 states. On average, predicates are now at 73.83% of their original sizes. [2018-11-12 16:13:53,925 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:13:54,315 INFO L415 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2018-11-12 16:13:54,315 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:13:54,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:13:54,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [8] total 27 [2018-11-12 16:13:54,316 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:13:54,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 16:13:54,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 16:13:54,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:13:54,318 INFO L87 Difference]: Start difference. First operand 2762 states and 3656 transitions. Second operand 21 states. [2018-11-12 16:14:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:14:22,350 INFO L93 Difference]: Finished difference Result 5542 states and 7855 transitions. [2018-11-12 16:14:22,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-12 16:14:22,351 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 237 [2018-11-12 16:14:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:14:22,365 INFO L225 Difference]: With dead ends: 5542 [2018-11-12 16:14:22,366 INFO L226 Difference]: Without dead ends: 3556 [2018-11-12 16:14:22,373 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 256 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2018-11-12 16:14:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2018-11-12 16:14:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 3539. [2018-11-12 16:14:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3539 states. [2018-11-12 16:14:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 4527 transitions. [2018-11-12 16:14:22,450 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 4527 transitions. Word has length 237 [2018-11-12 16:14:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:14:22,451 INFO L480 AbstractCegarLoop]: Abstraction has 3539 states and 4527 transitions. [2018-11-12 16:14:22,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 16:14:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 4527 transitions. [2018-11-12 16:14:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-11-12 16:14:22,457 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:14:22,457 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, 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] [2018-11-12 16:14:22,457 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:14:22,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:14:22,458 INFO L82 PathProgramCache]: Analyzing trace with hash 860254427, now seen corresponding path program 1 times [2018-11-12 16:14:22,458 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:14:22,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:14:22,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:14:22,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:14:22,459 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:14:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:14:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-11-12 16:14:22,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:14:22,814 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:14:22,814 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 286 with the following transitions: [2018-11-12 16:14:22,814 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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:14:22,819 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:14:22,819 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:14:22,968 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:14:24,537 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:14:24,537 INFO L272 AbstractInterpreter]: Visited 156 different actions 615 times. Merged at 7 different actions 24 times. Never widened. Performed 10284 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10284 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 16:14:24,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:14:24,572 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:14:25,096 INFO L227 lantSequenceWeakener]: Weakened 71 states. On average, predicates are now at 73.29% of their original sizes. [2018-11-12 16:14:25,096 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:14:25,401 INFO L415 sIntCurrentIteration]: We unified 284 AI predicates to 284 [2018-11-12 16:14:25,401 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:14:25,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:14:25,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [4] total 22 [2018-11-12 16:14:25,402 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:14:25,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 16:14:25,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 16:14:25,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:14:25,403 INFO L87 Difference]: Start difference. First operand 3539 states and 4527 transitions. Second operand 20 states. [2018-11-12 16:14:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:14:46,425 INFO L93 Difference]: Finished difference Result 6320 states and 9117 transitions. [2018-11-12 16:14:46,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-12 16:14:46,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 285 [2018-11-12 16:14:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:14:46,442 INFO L225 Difference]: With dead ends: 6320 [2018-11-12 16:14:46,443 INFO L226 Difference]: Without dead ends: 4720 [2018-11-12 16:14:46,450 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 296 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2018-11-12 16:14:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2018-11-12 16:14:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 3931. [2018-11-12 16:14:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3931 states. [2018-11-12 16:14:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 5005 transitions. [2018-11-12 16:14:46,546 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 5005 transitions. Word has length 285 [2018-11-12 16:14:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:14:46,547 INFO L480 AbstractCegarLoop]: Abstraction has 3931 states and 5005 transitions. [2018-11-12 16:14:46,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 16:14:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 5005 transitions. [2018-11-12 16:14:46,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-11-12 16:14:46,554 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:14:46,554 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, 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] [2018-11-12 16:14:46,554 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:14:46,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:14:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash 847353761, now seen corresponding path program 1 times [2018-11-12 16:14:46,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:14:46,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:14:46,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:14:46,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:14:46,556 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:14:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:14:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 184 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:14:47,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:14:47,642 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:14:47,642 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 292 with the following transitions: [2018-11-12 16:14:47,643 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], [514], [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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:14:47,645 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:14:47,645 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:14:47,727 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:14:48,088 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:14:48,088 INFO L272 AbstractInterpreter]: Visited 127 different actions 500 times. Merged at 8 different actions 27 times. Never widened. Performed 6927 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6927 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 16:14:48,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:14:48,098 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:14:48,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:14:48,098 INFO L192 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 [2018-11-12 16:14:48,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:14:48,109 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:14:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:14:48,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:14:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 16:14:48,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:14:49,370 WARN L179 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-12 16:14:50,020 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-12 16:14:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 16:14:50,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:14:50,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-12 16:14:50,407 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:14:50,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:14:50,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:14:50,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:14:50,409 INFO L87 Difference]: Start difference. First operand 3931 states and 5005 transitions. Second operand 18 states. [2018-11-12 16:14:51,103 WARN L179 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2018-11-12 16:14:56,990 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2018-11-12 16:15:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:15:04,314 INFO L93 Difference]: Finished difference Result 8862 states and 12524 transitions. [2018-11-12 16:15:04,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-12 16:15:04,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 291 [2018-11-12 16:15:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:15:04,344 INFO L225 Difference]: With dead ends: 8862 [2018-11-12 16:15:04,344 INFO L226 Difference]: Without dead ends: 6667 [2018-11-12 16:15:04,363 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 624 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1097, Invalid=4305, Unknown=0, NotChecked=0, Total=5402 [2018-11-12 16:15:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2018-11-12 16:15:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 5953. [2018-11-12 16:15:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5953 states. [2018-11-12 16:15:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 7216 transitions. [2018-11-12 16:15:04,531 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 7216 transitions. Word has length 291 [2018-11-12 16:15:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:15:04,531 INFO L480 AbstractCegarLoop]: Abstraction has 5953 states and 7216 transitions. [2018-11-12 16:15:04,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:15:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 7216 transitions. [2018-11-12 16:15:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-11-12 16:15:04,540 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:15:04,540 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, 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] [2018-11-12 16:15:04,541 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:15:04,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:15:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash -465824905, now seen corresponding path program 1 times [2018-11-12 16:15:04,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:15:04,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:15:04,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:15:04,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:15:04,543 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:15:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:15:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-11-12 16:15:04,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:15:04,889 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:15:04,889 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 294 with the following transitions: [2018-11-12 16:15:04,890 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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [874], [878], [889], [892], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:15:04,893 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:15:04,893 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:15:05,010 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:15:05,779 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:15:05,779 INFO L272 AbstractInterpreter]: Visited 160 different actions 633 times. Merged at 7 different actions 26 times. Never widened. Performed 8863 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8863 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 16:15:05,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:15:05,785 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:15:06,216 INFO L227 lantSequenceWeakener]: Weakened 14 states. On average, predicates are now at 74.31% of their original sizes. [2018-11-12 16:15:06,216 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:15:06,784 INFO L415 sIntCurrentIteration]: We unified 292 AI predicates to 292 [2018-11-12 16:15:06,784 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:15:06,785 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:15:06,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [4] total 22 [2018-11-12 16:15:06,785 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:15:06,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 16:15:06,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 16:15:06,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:15:06,787 INFO L87 Difference]: Start difference. First operand 5953 states and 7216 transitions. Second operand 20 states. [2018-11-12 16:15:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:15:32,660 INFO L93 Difference]: Finished difference Result 9670 states and 12072 transitions. [2018-11-12 16:15:32,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-12 16:15:32,661 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 293 [2018-11-12 16:15:32,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:15:32,678 INFO L225 Difference]: With dead ends: 9670 [2018-11-12 16:15:32,678 INFO L226 Difference]: Without dead ends: 6948 [2018-11-12 16:15:32,687 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 314 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=332, Invalid=1390, Unknown=0, NotChecked=0, Total=1722 [2018-11-12 16:15:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6948 states. [2018-11-12 16:15:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6948 to 6916. [2018-11-12 16:15:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6916 states. [2018-11-12 16:15:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6916 states to 6916 states and 8321 transitions. [2018-11-12 16:15:32,823 INFO L78 Accepts]: Start accepts. Automaton has 6916 states and 8321 transitions. Word has length 293 [2018-11-12 16:15:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:15:32,824 INFO L480 AbstractCegarLoop]: Abstraction has 6916 states and 8321 transitions. [2018-11-12 16:15:32,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 16:15:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 6916 states and 8321 transitions. [2018-11-12 16:15:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-11-12 16:15:32,832 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:15:32,833 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, 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] [2018-11-12 16:15:32,833 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:15:32,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:15:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash 738841538, now seen corresponding path program 1 times [2018-11-12 16:15:32,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:15:32,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:15:32,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:15:32,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:15:32,834 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:15:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:15:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 189 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:15:33,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:15:33,321 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:15:33,321 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 297 with the following transitions: [2018-11-12 16:15:33,321 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], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [574], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:15:33,324 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:15:33,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:15:33,458 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:15:34,307 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:15:34,307 INFO L272 AbstractInterpreter]: Visited 127 different actions 748 times. Merged at 8 different actions 44 times. Widened at 1 different actions 1 times. Performed 12077 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12077 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 16:15:34,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:15:34,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:15:34,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:15:34,316 INFO L192 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 [2018-11-12 16:15:34,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:15:34,325 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:15:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:15:34,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:15:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 16:15:34,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:15:34,814 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-12 16:15:35,017 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-11-12 16:15:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 16:15:35,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:15:35,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2018-11-12 16:15:35,457 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:15:35,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-12 16:15:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-12 16:15:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-11-12 16:15:35,458 INFO L87 Difference]: Start difference. First operand 6916 states and 8321 transitions. Second operand 14 states. [2018-11-12 16:15:37,152 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2018-11-12 16:15:49,928 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2018-11-12 16:15:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:15:50,558 INFO L93 Difference]: Finished difference Result 15707 states and 22783 transitions. [2018-11-12 16:15:50,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-11-12 16:15:50,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 296 [2018-11-12 16:15:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:15:50,628 INFO L225 Difference]: With dead ends: 15707 [2018-11-12 16:15:50,628 INFO L226 Difference]: Without dead ends: 11187 [2018-11-12 16:15:50,667 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 643 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1444, Invalid=6566, Unknown=0, NotChecked=0, Total=8010 [2018-11-12 16:15:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11187 states. [2018-11-12 16:15:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11187 to 10382. [2018-11-12 16:15:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10382 states. [2018-11-12 16:15:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10382 states to 10382 states and 12699 transitions. [2018-11-12 16:15:51,006 INFO L78 Accepts]: Start accepts. Automaton has 10382 states and 12699 transitions. Word has length 296 [2018-11-12 16:15:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:15:51,007 INFO L480 AbstractCegarLoop]: Abstraction has 10382 states and 12699 transitions. [2018-11-12 16:15:51,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-12 16:15:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 10382 states and 12699 transitions. [2018-11-12 16:15:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-11-12 16:15:51,019 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:15:51,019 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, 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] [2018-11-12 16:15:51,019 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:15:51,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:15:51,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1828580015, now seen corresponding path program 1 times [2018-11-12 16:15:51,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:15:51,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:15:51,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:15:51,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:15:51,021 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:15:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:15:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 34 proven. 221 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-12 16:15:51,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:15:51,532 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:15:51,532 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 304 with the following transitions: [2018-11-12 16:15:51,533 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], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 16:15:51,535 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:15:51,535 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:15:51,611 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:15:52,496 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:15:52,496 INFO L272 AbstractInterpreter]: Visited 137 different actions 676 times. Merged at 8 different actions 38 times. Widened at 1 different actions 1 times. Performed 10702 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10702 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 16:15:52,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:15:52,506 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:15:52,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:15:52,506 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:15:52,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:15:52,520 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:15:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:15:52,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:15:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 16:15:52,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:15:52,950 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-11-12 16:15:53,371 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-11-12 16:15:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 16:15:53,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:15:53,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 18 [2018-11-12 16:15:53,676 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:15:53,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 16:15:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 16:15:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:15:53,677 INFO L87 Difference]: Start difference. First operand 10382 states and 12699 transitions. Second operand 16 states. [2018-11-12 16:15:57,806 WARN L179 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2018-11-12 16:16:05,572 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 12 Received shutdown request... [2018-11-12 16:16:06,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-12 16:16:06,116 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:16:06,121 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:16:06,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:16:06 BoogieIcfgContainer [2018-11-12 16:16:06,121 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:16:06,122 INFO L168 Benchmark]: Toolchain (without parser) took 221015.76 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-12 16:16:06,123 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:16:06,124 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1016.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-11-12 16:16:06,125 INFO L168 Benchmark]: Boogie Procedure Inliner took 146.68 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -846.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2018-11-12 16:16:06,126 INFO L168 Benchmark]: Boogie Preprocessor took 106.97 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:16:06,126 INFO L168 Benchmark]: RCFGBuilder took 4297.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 183.3 MB). Peak memory consumption was 183.3 MB. Max. memory is 7.1 GB. [2018-11-12 16:16:06,127 INFO L168 Benchmark]: TraceAbstraction took 215442.55 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-11-12 16:16:06,132 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1016.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 146.68 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -846.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.97 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4297.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 183.3 MB). Peak memory consumption was 183.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215442.55 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 27]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 27). Cancelled while BasicCegarLoop was constructing difference of abstraction (10382states) and FLOYD_HOARE automaton (currently 63 states, 16 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 215.3s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 187.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3323 SDtfs, 27184 SDslu, 5648 SDs, 0 SdLazy, 43596 SolverSat, 7530 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 79.8s Time, PredicateUnifierStatistics: 14 DeclaredPredicates, 3880 GetRequests, 3453 SyntacticMatches, 7 SemanticMatches, 419 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7376 ImplicationChecksByTransitivity, 19.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10382occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 8.5s AbstIntTime, 10 AbstIntIterations, 7 AbstIntStrong, 0.9973824587618775 AbsIntWeakeningRatio, 0.12213267203967762 AbsIntAvgWeakeningVarsNumRemoved, 20.92064476131432 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 2805 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 3719 NumberOfCodeBlocks, 3719 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 4590 ConstructedInterpolants, 7 QuantifiedInterpolants, 8318497 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1634 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 2483/3152 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown