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/Problem14_label52_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:32:41,040 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:32:41,042 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:32:41,055 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:32:41,055 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:32:41,056 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:32:41,057 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:32:41,059 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:32:41,061 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:32:41,064 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:32:41,065 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:32:41,065 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:32:41,066 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:32:41,067 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:32:41,071 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:32:41,072 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:32:41,074 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:32:41,079 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:32:41,083 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:32:41,085 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:32:41,088 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:32:41,090 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:32:41,095 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:32:41,096 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:32:41,096 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:32:41,102 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:32:41,103 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:32:41,104 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:32:41,107 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:32:41,108 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:32:41,108 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:32:41,109 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:32:41,109 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:32:41,109 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:32:41,112 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:32:41,113 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:32:41,113 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 16:32:41,143 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:32:41,143 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:32:41,144 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:32:41,144 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:32:41,144 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:32:41,149 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:32:41,149 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:32:41,150 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:32:41,150 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:32:41,150 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:32:41,150 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:32:41,150 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:32:41,151 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:32:41,151 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:32:41,153 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:32:41,153 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:32:41,153 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:32:41,153 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:32:41,154 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:32:41,154 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:32:41,154 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:32:41,154 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:32:41,154 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:32:41,155 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:32:41,156 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:32:41,156 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:32:41,156 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:32:41,157 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:32:41,157 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:32:41,157 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:32:41,157 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:32:41,157 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:32:41,157 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:32:41,158 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:32:41,158 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:32:41,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:32:41,253 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:32:41,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:32:41,258 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:32:41,258 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:32:41,259 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label52_false-unreach-call_false-termination.c [2018-11-12 16:32:41,322 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e0797c54/0fa0b03cae3d4352b27c3e9659881e43/FLAG7a3648150 [2018-11-12 16:32:41,891 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:32:41,895 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52_false-unreach-call_false-termination.c [2018-11-12 16:32:41,912 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e0797c54/0fa0b03cae3d4352b27c3e9659881e43/FLAG7a3648150 [2018-11-12 16:32:41,933 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e0797c54/0fa0b03cae3d4352b27c3e9659881e43 [2018-11-12 16:32:41,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:32:41,945 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:32:41,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:32:41,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:32:41,950 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:32:41,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:32:41" (1/1) ... [2018-11-12 16:32:41,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2599d5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:41, skipping insertion in model container [2018-11-12 16:32:41,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:32:41" (1/1) ... [2018-11-12 16:32:41,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:32:42,053 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:32:42,658 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:32:42,664 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:32:42,813 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:32:42,833 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:32:42,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42 WrapperNode [2018-11-12 16:32:42,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:32:42,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:32:42,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:32:42,836 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:32:42,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (1/1) ... [2018-11-12 16:32:42,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (1/1) ... [2018-11-12 16:32:42,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:32:42,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:32:42,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:32:42,999 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:32:43,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (1/1) ... [2018-11-12 16:32:43,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (1/1) ... [2018-11-12 16:32:43,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (1/1) ... [2018-11-12 16:32:43,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (1/1) ... [2018-11-12 16:32:43,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (1/1) ... [2018-11-12 16:32:43,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (1/1) ... [2018-11-12 16:32:43,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (1/1) ... [2018-11-12 16:32:43,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:32:43,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:32:43,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:32:43,125 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:32:43,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (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 16:32:43,197 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:32:43,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:32:43,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:32:43,198 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:32:43,198 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:32:43,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:32:43,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:32:43,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:32:43,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:32:47,052 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:32:47,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:32:47 BoogieIcfgContainer [2018-11-12 16:32:47,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:32:47,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:32:47,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:32:47,058 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:32:47,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:32:41" (1/3) ... [2018-11-12 16:32:47,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e104b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:32:47, skipping insertion in model container [2018-11-12 16:32:47,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:42" (2/3) ... [2018-11-12 16:32:47,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e104b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:32:47, skipping insertion in model container [2018-11-12 16:32:47,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:32:47" (3/3) ... [2018-11-12 16:32:47,064 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label52_false-unreach-call_false-termination.c [2018-11-12 16:32:47,073 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:32:47,081 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:32:47,099 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:32:47,138 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:32:47,139 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:32:47,139 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:32:47,139 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:32:47,139 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:32:47,139 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:32:47,140 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:32:47,140 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:32:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 16:32:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-12 16:32:47,176 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:47,177 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:47,180 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:47,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1208637865, now seen corresponding path program 1 times [2018-11-12 16:32:47,188 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:47,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:47,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:47,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:47,239 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:47,593 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:32:47,712 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 16:32:47,714 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:32:47,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 16:32:47,715 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:47,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:32:47,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:32:47,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:32:47,736 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-12 16:32:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:49,717 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-12 16:32:49,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:32:49,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-11-12 16:32:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:49,738 INFO L225 Difference]: With dead ends: 691 [2018-11-12 16:32:49,738 INFO L226 Difference]: Without dead ends: 434 [2018-11-12 16:32:49,747 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 16:32:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-12 16:32:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-12 16:32:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-12 16:32:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-12 16:32:49,834 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 29 [2018-11-12 16:32:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:49,835 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-12 16:32:49,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:32:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-12 16:32:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-12 16:32:49,843 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:49,843 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:32:49,843 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:49,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1035560415, now seen corresponding path program 1 times [2018-11-12 16:32:49,844 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:49,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:49,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:49,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:49,846 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:32:50,150 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:32:50,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:32:50,150 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:50,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:32:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:32:50,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:32:50,153 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-12 16:32:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:52,351 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-12 16:32:52,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:32:52,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-11-12 16:32:52,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:52,358 INFO L225 Difference]: With dead ends: 1062 [2018-11-12 16:32:52,358 INFO L226 Difference]: Without dead ends: 634 [2018-11-12 16:32:52,361 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:32:52,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-12 16:32:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-12 16:32:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-12 16:32:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-12 16:32:52,406 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 116 [2018-11-12 16:32:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:52,407 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-12 16:32:52,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:32:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-12 16:32:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-12 16:32:52,411 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:52,411 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:32:52,411 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:52,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:52,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2098713064, now seen corresponding path program 1 times [2018-11-12 16:32:52,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:52,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:52,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:52,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:52,414 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:32:52,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:32:52,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:32:52,613 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:52,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:32:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:32:52,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:32:52,614 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-12 16:32:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:55,989 INFO L93 Difference]: Finished difference Result 2352 states and 4016 transitions. [2018-11-12 16:32:55,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:32:55,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2018-11-12 16:32:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:56,003 INFO L225 Difference]: With dead ends: 2352 [2018-11-12 16:32:56,003 INFO L226 Difference]: Without dead ends: 1733 [2018-11-12 16:32:56,010 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:32:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2018-11-12 16:32:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1733. [2018-11-12 16:32:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-11-12 16:32:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2647 transitions. [2018-11-12 16:32:56,090 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2647 transitions. Word has length 125 [2018-11-12 16:32:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:56,091 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 2647 transitions. [2018-11-12 16:32:56,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:32:56,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2647 transitions. [2018-11-12 16:32:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-11-12 16:32:56,109 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:56,111 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:32:56,111 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:56,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:56,111 INFO L82 PathProgramCache]: Analyzing trace with hash -839398590, now seen corresponding path program 1 times [2018-11-12 16:32:56,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:56,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:56,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:56,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:56,113 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:56,800 WARN L179 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-12 16:32:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 44 proven. 107 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:32:57,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:57,135 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:57,136 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 255 with the following transitions: [2018-11-12 16:32:57,138 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:57,187 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:57,188 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:57,816 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:57,829 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:32:57,831 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Performed 1031 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1031 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 16:32:57,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:57,874 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:32:58,522 INFO L227 lantSequenceWeakener]: Weakened 245 states. On average, predicates are now at 77.46% of their original sizes. [2018-11-12 16:32:58,523 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:32:58,895 INFO L415 sIntCurrentIteration]: We unified 253 AI predicates to 253 [2018-11-12 16:32:58,896 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:32:58,897 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:32:58,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-12 16:32:58,897 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:58,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:32:58,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:32:58,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:32:58,899 INFO L87 Difference]: Start difference. First operand 1733 states and 2647 transitions. Second operand 7 states. [2018-11-12 16:33:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:07,418 INFO L93 Difference]: Finished difference Result 3645 states and 5568 transitions. [2018-11-12 16:33:07,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:33:07,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 254 [2018-11-12 16:33:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:07,431 INFO L225 Difference]: With dead ends: 3645 [2018-11-12 16:33:07,432 INFO L226 Difference]: Without dead ends: 1918 [2018-11-12 16:33:07,441 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:33:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2018-11-12 16:33:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2018-11-12 16:33:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-12 16:33:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2838 transitions. [2018-11-12 16:33:07,495 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2838 transitions. Word has length 254 [2018-11-12 16:33:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:07,496 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2838 transitions. [2018-11-12 16:33:07,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:33:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2838 transitions. [2018-11-12 16:33:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-11-12 16:33:07,506 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:07,506 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 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 16:33:07,507 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:07,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:07,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1746897264, now seen corresponding path program 1 times [2018-11-12 16:33:07,507 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:07,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:07,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:07,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:07,509 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 154 proven. 189 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:33:08,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:08,385 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:08,386 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 340 with the following transitions: [2018-11-12 16:33:08,386 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:08,391 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:08,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:08,683 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:09,162 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:33:09,163 INFO L272 AbstractInterpreter]: Visited 122 different actions 240 times. Merged at 5 different actions 7 times. Never widened. Performed 3940 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3940 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:33:09,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:09,197 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:33:10,015 INFO L227 lantSequenceWeakener]: Weakened 120 states. On average, predicates are now at 78.01% of their original sizes. [2018-11-12 16:33:10,016 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:33:11,381 INFO L415 sIntCurrentIteration]: We unified 338 AI predicates to 338 [2018-11-12 16:33:11,381 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:33:11,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:33:11,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [12] total 33 [2018-11-12 16:33:11,381 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:11,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-12 16:33:11,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-12 16:33:11,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2018-11-12 16:33:11,383 INFO L87 Difference]: Start difference. First operand 1916 states and 2838 transitions. Second operand 23 states. [2018-11-12 16:33:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:32,019 INFO L93 Difference]: Finished difference Result 4357 states and 6366 transitions. [2018-11-12 16:33:32,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 16:33:32,019 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 339 [2018-11-12 16:33:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:32,033 INFO L225 Difference]: With dead ends: 4357 [2018-11-12 16:33:32,034 INFO L226 Difference]: Without dead ends: 1921 [2018-11-12 16:33:32,045 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 353 GetRequests, 311 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2018-11-12 16:33:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2018-11-12 16:33:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1916. [2018-11-12 16:33:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-12 16:33:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2832 transitions. [2018-11-12 16:33:32,100 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2832 transitions. Word has length 339 [2018-11-12 16:33:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:32,101 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2832 transitions. [2018-11-12 16:33:32,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-12 16:33:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2832 transitions. [2018-11-12 16:33:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-11-12 16:33:32,111 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:32,112 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:32,112 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:32,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1127648740, now seen corresponding path program 1 times [2018-11-12 16:33:32,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:32,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:32,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:32,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:32,114 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:32,646 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-12 16:33:33,056 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-12 16:33:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 316 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:33:33,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:33,630 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:33,631 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 366 with the following transitions: [2018-11-12 16:33:33,631 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:33,635 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:33,635 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:33,738 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:33,828 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:33:33,828 INFO L272 AbstractInterpreter]: Visited 122 different actions 240 times. Merged at 5 different actions 7 times. Never widened. Performed 3125 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3125 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:33:33,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:33,836 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:33:34,381 INFO L227 lantSequenceWeakener]: Weakened 30 states. On average, predicates are now at 80.21% of their original sizes. [2018-11-12 16:33:34,382 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:33:35,080 INFO L415 sIntCurrentIteration]: We unified 364 AI predicates to 364 [2018-11-12 16:33:35,081 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:33:35,081 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:33:35,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-12 16:33:35,082 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:35,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 16:33:35,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 16:33:35,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:33:35,083 INFO L87 Difference]: Start difference. First operand 1916 states and 2832 transitions. Second operand 21 states. [2018-11-12 16:33:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:50,038 INFO L93 Difference]: Finished difference Result 4020 states and 6042 transitions. [2018-11-12 16:33:50,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 16:33:50,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 365 [2018-11-12 16:33:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:50,050 INFO L225 Difference]: With dead ends: 4020 [2018-11-12 16:33:50,050 INFO L226 Difference]: Without dead ends: 2293 [2018-11-12 16:33:50,058 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 382 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-12 16:33:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2018-11-12 16:33:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2288. [2018-11-12 16:33:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2018-11-12 16:33:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3234 transitions. [2018-11-12 16:33:50,122 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3234 transitions. Word has length 365 [2018-11-12 16:33:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:50,124 INFO L480 AbstractCegarLoop]: Abstraction has 2288 states and 3234 transitions. [2018-11-12 16:33:50,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 16:33:50,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3234 transitions. [2018-11-12 16:33:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-11-12 16:33:50,138 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:50,139 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:50,139 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:50,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:50,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2054446806, now seen corresponding path program 1 times [2018-11-12 16:33:50,140 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:50,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:50,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:50,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:50,141 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 181 proven. 166 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-11-12 16:33:50,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:50,858 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:50,859 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 451 with the following transitions: [2018-11-12 16:33:50,859 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:50,865 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:50,866 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:51,033 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:51,271 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:33:51,271 INFO L272 AbstractInterpreter]: Visited 123 different actions 369 times. Merged at 7 different actions 22 times. Never widened. Performed 5393 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5393 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:33:51,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:51,279 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:33:51,741 INFO L227 lantSequenceWeakener]: Weakened 162 states. On average, predicates are now at 77.81% of their original sizes. [2018-11-12 16:33:51,741 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:33:52,119 INFO L415 sIntCurrentIteration]: We unified 449 AI predicates to 449 [2018-11-12 16:33:52,119 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:33:52,119 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:33:52,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-12 16:33:52,119 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:52,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 16:33:52,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 16:33:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-11-12 16:33:52,121 INFO L87 Difference]: Start difference. First operand 2288 states and 3234 transitions. Second operand 22 states. [2018-11-12 16:34:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:07,053 INFO L93 Difference]: Finished difference Result 4986 states and 7072 transitions. [2018-11-12 16:34:07,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-12 16:34:07,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 450 [2018-11-12 16:34:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:07,065 INFO L225 Difference]: With dead ends: 4986 [2018-11-12 16:34:07,065 INFO L226 Difference]: Without dead ends: 2293 [2018-11-12 16:34:07,075 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 464 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2018-11-12 16:34:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2018-11-12 16:34:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2288. [2018-11-12 16:34:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2018-11-12 16:34:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3212 transitions. [2018-11-12 16:34:07,139 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3212 transitions. Word has length 450 [2018-11-12 16:34:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:07,139 INFO L480 AbstractCegarLoop]: Abstraction has 2288 states and 3212 transitions. [2018-11-12 16:34:07,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 16:34:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3212 transitions. [2018-11-12 16:34:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-11-12 16:34:07,155 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:07,155 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:34:07,155 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:07,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:07,156 INFO L82 PathProgramCache]: Analyzing trace with hash -834363183, now seen corresponding path program 1 times [2018-11-12 16:34:07,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:07,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:07,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:07,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:07,157 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 320 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-12 16:34:08,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:08,424 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:08,424 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 476 with the following transitions: [2018-11-12 16:34:08,424 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:08,429 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:08,429 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:08,509 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:08,809 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:34:08,809 INFO L272 AbstractInterpreter]: Visited 123 different actions 362 times. Merged at 7 different actions 15 times. Never widened. Performed 3543 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3543 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:34:08,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:08,846 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:34:09,287 INFO L227 lantSequenceWeakener]: Weakened 472 states. On average, predicates are now at 80.03% of their original sizes. [2018-11-12 16:34:09,288 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:34:09,412 INFO L415 sIntCurrentIteration]: We unified 474 AI predicates to 474 [2018-11-12 16:34:09,412 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:34:09,412 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:34:09,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 16:34:09,413 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:34:09,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:34:09,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:34:09,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:34:09,414 INFO L87 Difference]: Start difference. First operand 2288 states and 3212 transitions. Second operand 10 states. [2018-11-12 16:34:13,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:13,347 INFO L93 Difference]: Finished difference Result 4400 states and 6472 transitions. [2018-11-12 16:34:13,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:34:13,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 475 [2018-11-12 16:34:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:13,359 INFO L225 Difference]: With dead ends: 4400 [2018-11-12 16:34:13,360 INFO L226 Difference]: Without dead ends: 2673 [2018-11-12 16:34:13,368 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 482 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:34:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2018-11-12 16:34:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2662. [2018-11-12 16:34:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2018-11-12 16:34:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3722 transitions. [2018-11-12 16:34:13,436 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3722 transitions. Word has length 475 [2018-11-12 16:34:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:13,436 INFO L480 AbstractCegarLoop]: Abstraction has 2662 states and 3722 transitions. [2018-11-12 16:34:13,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:34:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3722 transitions. [2018-11-12 16:34:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-11-12 16:34:13,447 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:13,447 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-11-12 16:34:13,448 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:13,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:13,448 INFO L82 PathProgramCache]: Analyzing trace with hash 287781920, now seen corresponding path program 1 times [2018-11-12 16:34:13,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:13,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:13,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:13,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:13,449 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 322 proven. 321 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-12 16:34:14,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:14,994 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:14,994 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 543 with the following transitions: [2018-11-12 16:34:14,995 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:14,998 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:14,999 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:15,162 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:15,869 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:34:15,869 INFO L272 AbstractInterpreter]: Visited 191 different actions 958 times. Merged at 9 different actions 51 times. Widened at 1 different actions 2 times. Performed 11584 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11584 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:34:15,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:15,879 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:34:15,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:15,879 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 16:34:15,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:15,890 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:34:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:16,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 620 proven. 2 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-11-12 16:34:16,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 320 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-12 16:34:17,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:34:17,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-12 16:34:17,621 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:34:17,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:34:17,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:34:17,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:34:17,623 INFO L87 Difference]: Start difference. First operand 2662 states and 3722 transitions. Second operand 17 states. [2018-11-12 16:34:19,511 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2018-11-12 16:34:21,084 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-12 16:34:21,351 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-12 16:34:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:29,385 INFO L93 Difference]: Finished difference Result 7343 states and 11252 transitions. [2018-11-12 16:34:29,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-12 16:34:29,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 542 [2018-11-12 16:34:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:29,410 INFO L225 Difference]: With dead ends: 7343 [2018-11-12 16:34:29,410 INFO L226 Difference]: Without dead ends: 5242 [2018-11-12 16:34:29,429 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1117 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-12 16:34:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2018-11-12 16:34:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 5124. [2018-11-12 16:34:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5124 states. [2018-11-12 16:34:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 6935 transitions. [2018-11-12 16:34:29,574 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 6935 transitions. Word has length 542 [2018-11-12 16:34:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:29,575 INFO L480 AbstractCegarLoop]: Abstraction has 5124 states and 6935 transitions. [2018-11-12 16:34:29,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:34:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 6935 transitions. [2018-11-12 16:34:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2018-11-12 16:34:29,593 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:29,594 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:34:29,594 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:29,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:29,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2018425497, now seen corresponding path program 1 times [2018-11-12 16:34:29,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:29,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:29,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:29,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:29,597 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 429 proven. 457 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-11-12 16:34:31,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:31,293 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:31,294 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 549 with the following transitions: [2018-11-12 16:34:31,294 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:31,296 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:31,296 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:31,388 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:31,661 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:34:31,661 INFO L272 AbstractInterpreter]: Visited 125 different actions 491 times. Merged at 8 different actions 27 times. Never widened. Performed 5937 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5937 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:34:31,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:31,668 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:34:31,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:31,668 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 16:34:31,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:31,678 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:34:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:31,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 791 proven. 2 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-11-12 16:34:32,312 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 423 proven. 111 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-11-12 16:34:33,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:34:33,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:34:33,010 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:34:33,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:34:33,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:34:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:34:33,011 INFO L87 Difference]: Start difference. First operand 5124 states and 6935 transitions. Second operand 17 states. [2018-11-12 16:34:39,994 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2018-11-12 16:34:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:40,253 INFO L93 Difference]: Finished difference Result 11121 states and 15957 transitions. [2018-11-12 16:34:40,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-12 16:34:40,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 548 [2018-11-12 16:34:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:40,282 INFO L225 Difference]: With dead ends: 11121 [2018-11-12 16:34:40,282 INFO L226 Difference]: Without dead ends: 5443 [2018-11-12 16:34:40,315 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1154 GetRequests, 1107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=521, Invalid=1735, Unknown=0, NotChecked=0, Total=2256 [2018-11-12 16:34:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5443 states. [2018-11-12 16:34:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5443 to 5311. [2018-11-12 16:34:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5311 states. [2018-11-12 16:34:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5311 states to 5311 states and 6313 transitions. [2018-11-12 16:34:40,445 INFO L78 Accepts]: Start accepts. Automaton has 5311 states and 6313 transitions. Word has length 548 [2018-11-12 16:34:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:40,446 INFO L480 AbstractCegarLoop]: Abstraction has 5311 states and 6313 transitions. [2018-11-12 16:34:40,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:34:40,446 INFO L276 IsEmpty]: Start isEmpty. Operand 5311 states and 6313 transitions. [2018-11-12 16:34:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2018-11-12 16:34:40,458 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:40,458 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2018-11-12 16:34:40,459 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:40,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:40,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1952249540, now seen corresponding path program 2 times [2018-11-12 16:34:40,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:40,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:40,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:40,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:40,460 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 461 proven. 111 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-12 16:34:41,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:41,224 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:41,225 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 16:34:41,225 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 16:34:41,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:41,225 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 16:34:41,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-12 16:34:41,234 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-12 16:34:41,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-12 16:34:41,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-12 16:34:41,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2018-11-12 16:34:41,746 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2018-11-12 16:34:42,054 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:34:42,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-12 16:34:42,054 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:34:42,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:34:42,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:34:42,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:34:42,055 INFO L87 Difference]: Start difference. First operand 5311 states and 6313 transitions. Second operand 3 states. [2018-11-12 16:34:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:43,400 INFO L93 Difference]: Finished difference Result 12772 states and 15465 transitions. [2018-11-12 16:34:43,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:34:43,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 653 [2018-11-12 16:34:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:43,434 INFO L225 Difference]: With dead ends: 12772 [2018-11-12 16:34:43,434 INFO L226 Difference]: Without dead ends: 8022 [2018-11-12 16:34:43,448 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1305 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:34:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8022 states. [2018-11-12 16:34:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8022 to 8010. [2018-11-12 16:34:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8010 states. [2018-11-12 16:34:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8010 states to 8010 states and 9284 transitions. [2018-11-12 16:34:43,613 INFO L78 Accepts]: Start accepts. Automaton has 8010 states and 9284 transitions. Word has length 653 [2018-11-12 16:34:43,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:43,614 INFO L480 AbstractCegarLoop]: Abstraction has 8010 states and 9284 transitions. [2018-11-12 16:34:43,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:34:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 8010 states and 9284 transitions. [2018-11-12 16:34:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2018-11-12 16:34:43,635 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:43,636 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:34:43,636 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:43,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:43,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1073650876, now seen corresponding path program 1 times [2018-11-12 16:34:43,637 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:43,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:43,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 16:34:43,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:43,638 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 461 proven. 175 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-12 16:34:44,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:44,389 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:44,389 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 718 with the following transitions: [2018-11-12 16:34:44,389 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:44,392 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:44,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:44,564 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:46,247 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:34:46,248 INFO L272 AbstractInterpreter]: Visited 191 different actions 1140 times. Merged at 9 different actions 53 times. Widened at 1 different actions 1 times. Performed 13956 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13956 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:34:46,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:46,255 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:34:46,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:46,255 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:34:46,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:46,264 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:34:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:46,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 931 proven. 2 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-12 16:34:46,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:47,267 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-12 16:34:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 461 proven. 175 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-12 16:34:47,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:34:47,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:34:47,967 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:34:47,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:34:47,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:34:47,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:34:47,971 INFO L87 Difference]: Start difference. First operand 8010 states and 9284 transitions. Second operand 7 states. [2018-11-12 16:34:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:50,938 INFO L93 Difference]: Finished difference Result 22115 states and 29850 transitions. [2018-11-12 16:34:50,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:34:50,938 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 717 [2018-11-12 16:34:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:51,028 INFO L225 Difference]: With dead ends: 22115 [2018-11-12 16:34:51,029 INFO L226 Difference]: Without dead ends: 14666 [2018-11-12 16:34:51,086 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 1437 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:34:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14666 states. [2018-11-12 16:34:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14666 to 14311. [2018-11-12 16:34:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14311 states. [2018-11-12 16:34:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14311 states to 14311 states and 16830 transitions. [2018-11-12 16:34:51,474 INFO L78 Accepts]: Start accepts. Automaton has 14311 states and 16830 transitions. Word has length 717 [2018-11-12 16:34:51,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:51,475 INFO L480 AbstractCegarLoop]: Abstraction has 14311 states and 16830 transitions. [2018-11-12 16:34:51,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:34:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 14311 states and 16830 transitions. [2018-11-12 16:34:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2018-11-12 16:34:51,502 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:51,502 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:34:51,503 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:51,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1355681563, now seen corresponding path program 1 times [2018-11-12 16:34:51,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:51,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:51,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:51,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:51,504 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 468 proven. 175 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-12 16:34:52,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:52,432 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:52,432 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 725 with the following transitions: [2018-11-12 16:34:52,432 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:52,435 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:52,436 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:52,624 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:53,340 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:34:53,340 INFO L272 AbstractInterpreter]: Visited 192 different actions 968 times. Merged at 10 different actions 56 times. Widened at 1 different actions 1 times. Performed 11590 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11590 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:34:53,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:53,349 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:34:53,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:53,349 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:34:53,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:53,359 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:34:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:53,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 945 proven. 2 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-12 16:34:54,098 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 468 proven. 175 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-12 16:34:54,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:34:54,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:34:54,599 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:34:54,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:34:54,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:34:54,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:34:54,600 INFO L87 Difference]: Start difference. First operand 14311 states and 16830 transitions. Second operand 7 states. [2018-11-12 16:34:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:57,111 INFO L93 Difference]: Finished difference Result 34064 states and 46991 transitions. [2018-11-12 16:34:57,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:34:57,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 724 [2018-11-12 16:34:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:57,266 INFO L225 Difference]: With dead ends: 34064 [2018-11-12 16:34:57,266 INFO L226 Difference]: Without dead ends: 20314 [2018-11-12 16:34:57,392 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1463 GetRequests, 1450 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:34:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20314 states. [2018-11-12 16:34:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20314 to 19812. [2018-11-12 16:34:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19812 states. [2018-11-12 16:34:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 23850 transitions. [2018-11-12 16:34:57,974 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 23850 transitions. Word has length 724 [2018-11-12 16:34:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:57,974 INFO L480 AbstractCegarLoop]: Abstraction has 19812 states and 23850 transitions. [2018-11-12 16:34:57,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:34:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 23850 transitions. [2018-11-12 16:34:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2018-11-12 16:34:58,009 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:58,010 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:34:58,010 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:58,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:58,010 INFO L82 PathProgramCache]: Analyzing trace with hash 523964780, now seen corresponding path program 1 times [2018-11-12 16:34:58,011 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:58,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:58,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:58,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:58,012 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 467 proven. 701 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-11-12 16:34:59,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:59,949 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:59,949 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 770 with the following transitions: [2018-11-12 16:34:59,949 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:59,953 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:59,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:00,104 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:01,069 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:01,069 INFO L272 AbstractInterpreter]: Visited 192 different actions 1160 times. Merged at 10 different actions 68 times. Widened at 1 different actions 3 times. Performed 14177 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14177 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 16 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:35:01,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:01,081 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:01,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:01,081 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:01,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:01,092 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:01,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 1035 proven. 2 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-12 16:35:01,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:35:02,034 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2018-11-12 16:35:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 513 proven. 175 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2018-11-12 16:35:02,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:35:02,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-12 16:35:02,682 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:35:02,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:35:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:35:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:35:02,684 INFO L87 Difference]: Start difference. First operand 19812 states and 23850 transitions. Second operand 17 states. [2018-11-12 16:35:06,588 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-12 16:35:07,798 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-12 16:35:08,713 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-12 16:35:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:09,718 INFO L93 Difference]: Finished difference Result 43861 states and 55183 transitions. [2018-11-12 16:35:09,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-12 16:35:09,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 769 [2018-11-12 16:35:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:09,826 INFO L225 Difference]: With dead ends: 43861 [2018-11-12 16:35:09,826 INFO L226 Difference]: Without dead ends: 24242 [2018-11-12 16:35:09,937 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1610 GetRequests, 1560 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-12 16:35:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24242 states. [2018-11-12 16:35:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24242 to 23988. [2018-11-12 16:35:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23988 states. [2018-11-12 16:35:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23988 states to 23988 states and 29294 transitions. [2018-11-12 16:35:10,466 INFO L78 Accepts]: Start accepts. Automaton has 23988 states and 29294 transitions. Word has length 769 [2018-11-12 16:35:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:10,466 INFO L480 AbstractCegarLoop]: Abstraction has 23988 states and 29294 transitions. [2018-11-12 16:35:10,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:35:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 23988 states and 29294 transitions. [2018-11-12 16:35:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2018-11-12 16:35:10,485 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:10,486 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:35:10,486 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:10,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:10,487 INFO L82 PathProgramCache]: Analyzing trace with hash -522691446, now seen corresponding path program 1 times [2018-11-12 16:35:10,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:10,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:10,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:10,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:10,488 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 658 proven. 175 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-11-12 16:35:11,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:11,578 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:11,579 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 885 with the following transitions: [2018-11-12 16:35:11,579 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:11,582 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:11,582 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:11,754 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:12,726 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:12,726 INFO L272 AbstractInterpreter]: Visited 193 different actions 1369 times. Merged at 11 different actions 90 times. Widened at 1 different actions 4 times. Performed 16377 root evaluator evaluations with a maximum evaluation depth of 6. Performed 16377 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 24 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:35:12,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:12,731 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:12,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:12,731 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:12,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:12,741 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:12,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 1290 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-11-12 16:35:13,237 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:35:13,463 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-11-12 16:35:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 658 proven. 175 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-11-12 16:35:13,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:35:13,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:35:13,904 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:35:13,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:35:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:35:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:35:13,906 INFO L87 Difference]: Start difference. First operand 23988 states and 29294 transitions. Second operand 7 states. [2018-11-12 16:35:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:16,187 INFO L93 Difference]: Finished difference Result 46163 states and 56859 transitions. [2018-11-12 16:35:16,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:35:16,188 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 884 [2018-11-12 16:35:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:16,279 INFO L225 Difference]: With dead ends: 46163 [2018-11-12 16:35:16,279 INFO L226 Difference]: Without dead ends: 22549 [2018-11-12 16:35:16,378 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1783 GetRequests, 1770 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:35:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22549 states. [2018-11-12 16:35:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22549 to 22102. [2018-11-12 16:35:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22102 states. [2018-11-12 16:35:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22102 states to 22102 states and 25928 transitions. [2018-11-12 16:35:16,787 INFO L78 Accepts]: Start accepts. Automaton has 22102 states and 25928 transitions. Word has length 884 [2018-11-12 16:35:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:16,787 INFO L480 AbstractCegarLoop]: Abstraction has 22102 states and 25928 transitions. [2018-11-12 16:35:16,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:35:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 22102 states and 25928 transitions. [2018-11-12 16:35:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2018-11-12 16:35:16,807 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:16,807 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:35:16,807 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:16,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:16,808 INFO L82 PathProgramCache]: Analyzing trace with hash -758618894, now seen corresponding path program 1 times [2018-11-12 16:35:16,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:16,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:16,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:16,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:16,809 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:17,677 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:35:17,893 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:35:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 541 proven. 1222 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2018-11-12 16:35:20,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:20,147 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:20,147 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 980 with the following transitions: [2018-11-12 16:35:20,147 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:20,150 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:20,151 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:20,369 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:21,279 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:21,280 INFO L272 AbstractInterpreter]: Visited 194 different actions 987 times. Merged at 12 different actions 65 times. Widened at 1 different actions 1 times. Performed 11744 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11744 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 19 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-12 16:35:21,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:21,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:21,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:21,289 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:21,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:21,303 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:21,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1768 proven. 2 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2018-11-12 16:35:22,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:35:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 542 proven. 424 refuted. 0 times theorem prover too weak. 1528 trivial. 0 not checked. [2018-11-12 16:35:23,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:35:23,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-12 16:35:23,574 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:35:23,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:35:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:35:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:35:23,576 INFO L87 Difference]: Start difference. First operand 22102 states and 25928 transitions. Second operand 18 states. [2018-11-12 16:35:25,600 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2018-11-12 16:35:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:32,495 INFO L93 Difference]: Finished difference Result 39933 states and 47161 transitions. [2018-11-12 16:35:32,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-12 16:35:32,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 979 [2018-11-12 16:35:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:32,538 INFO L225 Difference]: With dead ends: 39933 [2018-11-12 16:35:32,538 INFO L226 Difference]: Without dead ends: 18205 [2018-11-12 16:35:32,587 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2048 GetRequests, 1985 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=850, Invalid=3310, Unknown=0, NotChecked=0, Total=4160 [2018-11-12 16:35:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18205 states. [2018-11-12 16:35:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18205 to 17860. [2018-11-12 16:35:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17860 states. [2018-11-12 16:35:32,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17860 states to 17860 states and 20127 transitions. [2018-11-12 16:35:32,890 INFO L78 Accepts]: Start accepts. Automaton has 17860 states and 20127 transitions. Word has length 979 [2018-11-12 16:35:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:32,891 INFO L480 AbstractCegarLoop]: Abstraction has 17860 states and 20127 transitions. [2018-11-12 16:35:32,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:35:32,891 INFO L276 IsEmpty]: Start isEmpty. Operand 17860 states and 20127 transitions. [2018-11-12 16:35:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1025 [2018-11-12 16:35:32,918 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:32,918 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:35:32,918 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:32,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:32,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1558803585, now seen corresponding path program 1 times [2018-11-12 16:35:32,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:32,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:32,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:32,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:32,920 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 1443 proven. 6 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2018-11-12 16:35:33,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:33,867 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:33,867 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1025 with the following transitions: [2018-11-12 16:35:33,867 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:33,871 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:33,871 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:34,077 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:34,961 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:34,961 INFO L272 AbstractInterpreter]: Visited 194 different actions 982 times. Merged at 12 different actions 60 times. Never widened. Performed 13592 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13592 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 19 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:35:34,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:34,967 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:34,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:34,967 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:34,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:34,976 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:35,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 1443 proven. 6 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2018-11-12 16:35:36,066 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:35:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 1443 proven. 175 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2018-11-12 16:35:37,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:35:37,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2018-11-12 16:35:37,037 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:35:37,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:35:37,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:35:37,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-12 16:35:37,038 INFO L87 Difference]: Start difference. First operand 17860 states and 20127 transitions. Second operand 9 states. [2018-11-12 16:35:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:39,951 INFO L93 Difference]: Finished difference Result 40953 states and 46863 transitions. [2018-11-12 16:35:39,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 16:35:39,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1024 [2018-11-12 16:35:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:39,996 INFO L225 Difference]: With dead ends: 40953 [2018-11-12 16:35:39,996 INFO L226 Difference]: Without dead ends: 23467 [2018-11-12 16:35:40,032 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2067 GetRequests, 2047 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:35:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23467 states. [2018-11-12 16:35:40,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23467 to 22884. [2018-11-12 16:35:40,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22884 states. [2018-11-12 16:35:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22884 states to 22884 states and 25966 transitions. [2018-11-12 16:35:40,377 INFO L78 Accepts]: Start accepts. Automaton has 22884 states and 25966 transitions. Word has length 1024 [2018-11-12 16:35:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:40,378 INFO L480 AbstractCegarLoop]: Abstraction has 22884 states and 25966 transitions. [2018-11-12 16:35:40,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:35:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 22884 states and 25966 transitions. [2018-11-12 16:35:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2018-11-12 16:35:40,413 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:40,413 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:35:40,413 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:40,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash 390740381, now seen corresponding path program 1 times [2018-11-12 16:35:40,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:40,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:40,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:40,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:40,415 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 859 proven. 1897 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-12 16:35:44,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:44,361 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:44,361 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1156 with the following transitions: [2018-11-12 16:35:44,361 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:44,364 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:44,365 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:44,514 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:45,433 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:45,433 INFO L272 AbstractInterpreter]: Visited 195 different actions 1196 times. Merged at 13 different actions 86 times. Widened at 1 different actions 2 times. Performed 14975 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14975 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 28 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:35:45,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:45,450 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:45,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:45,450 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:45,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:45,459 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:45,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 1801 proven. 2 refuted. 0 times theorem prover too weak. 1670 trivial. 0 not checked. [2018-11-12 16:35:46,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:35:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 910 proven. 130 refuted. 0 times theorem prover too weak. 2433 trivial. 0 not checked. [2018-11-12 16:35:47,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:35:47,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 19 [2018-11-12 16:35:47,484 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:35:47,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:35:47,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:35:47,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:35:47,486 INFO L87 Difference]: Start difference. First operand 22884 states and 25966 transitions. Second operand 18 states. [2018-11-12 16:35:49,109 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2018-11-12 16:35:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:52,775 INFO L93 Difference]: Finished difference Result 44154 states and 50322 transitions. [2018-11-12 16:35:52,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-12 16:35:52,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1155 [2018-11-12 16:35:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:52,816 INFO L225 Difference]: With dead ends: 44154 [2018-11-12 16:35:52,816 INFO L226 Difference]: Without dead ends: 21644 [2018-11-12 16:35:52,859 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2393 GetRequests, 2338 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=558, Invalid=2198, Unknown=0, NotChecked=0, Total=2756 [2018-11-12 16:35:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21644 states. [2018-11-12 16:35:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21644 to 19498. [2018-11-12 16:35:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19498 states. [2018-11-12 16:35:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19498 states to 19498 states and 21005 transitions. [2018-11-12 16:35:53,137 INFO L78 Accepts]: Start accepts. Automaton has 19498 states and 21005 transitions. Word has length 1155 [2018-11-12 16:35:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:53,137 INFO L480 AbstractCegarLoop]: Abstraction has 19498 states and 21005 transitions. [2018-11-12 16:35:53,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:35:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 19498 states and 21005 transitions. [2018-11-12 16:35:53,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2018-11-12 16:35:53,168 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:53,169 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:35:53,169 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:53,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:53,170 INFO L82 PathProgramCache]: Analyzing trace with hash -379757479, now seen corresponding path program 1 times [2018-11-12 16:35:53,170 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:53,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:53,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:53,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:53,171 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4388 backedges. 1004 proven. 2141 refuted. 0 times theorem prover too weak. 1243 trivial. 0 not checked. [2018-11-12 16:35:55,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:55,959 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:55,960 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1275 with the following transitions: [2018-11-12 16:35:55,960 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [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], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [690], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:55,963 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:55,963 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:56,285 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:57,235 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:57,236 INFO L272 AbstractInterpreter]: Visited 196 different actions 1201 times. Merged at 13 different actions 85 times. Widened at 1 different actions 2 times. Performed 16695 root evaluator evaluations with a maximum evaluation depth of 6. Performed 16695 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 31 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:35:57,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:57,245 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:57,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:57,245 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:57,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:57,254 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:57,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4388 backedges. 2064 proven. 2 refuted. 0 times theorem prover too weak. 2322 trivial. 0 not checked. [2018-11-12 16:35:58,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:36:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4388 backedges. 1059 proven. 130 refuted. 0 times theorem prover too weak. 3199 trivial. 0 not checked. [2018-11-12 16:36:00,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:36:00,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 22 [2018-11-12 16:36:00,205 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:36:00,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 16:36:00,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 16:36:00,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2018-11-12 16:36:00,208 INFO L87 Difference]: Start difference. First operand 19498 states and 21005 transitions. Second operand 20 states. [2018-11-12 16:36:06,277 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2018-11-12 16:36:06,641 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2018-11-12 16:36:09,908 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2018-11-12 16:36:10,626 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2018-11-12 16:36:11,392 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2018-11-12 16:36:11,781 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2018-11-12 16:36:11,989 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2018-11-12 16:36:13,276 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 Received shutdown request... [2018-11-12 16:36:21,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-11-12 16:36:21,543 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:36:21,547 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:36:21,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:36:21 BoogieIcfgContainer [2018-11-12 16:36:21,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:36:21,548 INFO L168 Benchmark]: Toolchain (without parser) took 219604.52 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: -24.8 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-11-12 16:36:21,550 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:36:21,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 889.23 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-11-12 16:36:21,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 162.93 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -830.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2018-11-12 16:36:21,552 INFO L168 Benchmark]: Boogie Preprocessor took 125.87 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 16:36:21,552 INFO L168 Benchmark]: RCFGBuilder took 3928.01 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.9 MB). Peak memory consumption was 129.9 MB. Max. memory is 7.1 GB. [2018-11-12 16:36:21,553 INFO L168 Benchmark]: TraceAbstraction took 214492.71 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.4 GB in the end (delta: 623.4 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-11-12 16:36:21,557 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 889.23 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 162.93 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -830.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.87 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 3928.01 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.9 MB). Peak memory consumption was 129.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214492.71 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.4 GB in the end (delta: 623.4 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 70). Cancelled while BasicCegarLoop was constructing difference of abstraction (19498states) and FLOYD_HOARE automaton (currently 109 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 127 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 214.4s OverallTime, 19 OverallIterations, 10 TraceHistogramMax, 145.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2912 SDtfs, 50758 SDslu, 5050 SDs, 0 SdLazy, 57911 SolverSat, 8907 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.8s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 21138 GetRequests, 20517 SyntacticMatches, 19 SemanticMatches, 601 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11240 ImplicationChecksByTransitivity, 30.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23988occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 13.5s AbstIntTime, 15 AbstIntIterations, 5 AbstIntStrong, 0.9972359168155746 AbsIntWeakeningRatio, 0.08839190628328009 AbsIntAvgWeakeningVarsNumRemoved, 16.757188498402556 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 18 MinimizatonAttempts, 4931 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 29.2s InterpolantComputationTime, 20691 NumberOfCodeBlocks, 20179 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 29919 ConstructedInterpolants, 25 QuantifiedInterpolants, 100092342 SizeOfPredicates, 35 NumberOfNonLiveVariables, 12300 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 41 InterpolantComputations, 5 PerfectInterpolantSequences, 58170/68245 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown