java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label46_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:41:24,981 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:41:24,985 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:41:25,006 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:41:25,007 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:41:25,009 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:41:25,010 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:41:25,012 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:41:25,014 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:41:25,018 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:41:25,019 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:41:25,019 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:41:25,021 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:41:25,023 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:41:25,024 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:41:25,030 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:41:25,031 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:41:25,034 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:41:25,038 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:41:25,041 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:41:25,044 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:41:25,047 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:41:25,052 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:41:25,053 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:41:25,053 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:41:25,054 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:41:25,055 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:41:25,057 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:41:25,058 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:41:25,060 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:41:25,060 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:41:25,061 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:41:25,061 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:41:25,061 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:41:25,063 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:41:25,064 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:41:25,065 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 18:41:25,091 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:41:25,091 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:41:25,092 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:41:25,092 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:41:25,092 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:41:25,093 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:41:25,093 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:41:25,093 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:41:25,093 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:41:25,093 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:41:25,094 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:41:25,094 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:41:25,094 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:41:25,095 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:41:25,095 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:41:25,095 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:41:25,095 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:41:25,096 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:41:25,096 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:41:25,096 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:41:25,096 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:41:25,097 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:41:25,097 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:41:25,097 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:41:25,097 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:41:25,097 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:41:25,098 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:41:25,098 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:41:25,098 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:41:25,098 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:41:25,098 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:41:25,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:41:25,099 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:41:25,099 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:41:25,099 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:41:25,144 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:41:25,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:41:25,161 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:41:25,162 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:41:25,163 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:41:25,164 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label46_true-unreach-call.c [2018-11-12 18:41:25,235 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76967da04/ac1a7894210e452997f982485ba32b72/FLAG5c81ea2a9 [2018-11-12 18:41:25,952 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:41:25,953 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label46_true-unreach-call.c [2018-11-12 18:41:25,968 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76967da04/ac1a7894210e452997f982485ba32b72/FLAG5c81ea2a9 [2018-11-12 18:41:25,984 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76967da04/ac1a7894210e452997f982485ba32b72 [2018-11-12 18:41:25,996 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:41:25,998 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:41:25,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:41:25,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:41:26,003 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:41:26,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:41:25" (1/1) ... [2018-11-12 18:41:26,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7c9eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:26, skipping insertion in model container [2018-11-12 18:41:26,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:41:25" (1/1) ... [2018-11-12 18:41:26,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:41:26,086 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:41:26,770 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:41:26,775 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:41:27,003 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:41:27,022 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:41:27,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27 WrapperNode [2018-11-12 18:41:27,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:41:27,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:41:27,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:41:27,024 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:41:27,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (1/1) ... [2018-11-12 18:41:27,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (1/1) ... [2018-11-12 18:41:27,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:41:27,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:41:27,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:41:27,221 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:41:27,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (1/1) ... [2018-11-12 18:41:27,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (1/1) ... [2018-11-12 18:41:27,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (1/1) ... [2018-11-12 18:41:27,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (1/1) ... [2018-11-12 18:41:27,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (1/1) ... [2018-11-12 18:41:27,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (1/1) ... [2018-11-12 18:41:27,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (1/1) ... [2018-11-12 18:41:27,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:41:27,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:41:27,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:41:27,374 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:41:27,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (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 18:41:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:41:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:41:27,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:41:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:41:27,447 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:41:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:41:27,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:41:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:41:27,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:41:32,383 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:41:32,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:41:32 BoogieIcfgContainer [2018-11-12 18:41:32,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:41:32,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:41:32,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:41:32,389 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:41:32,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:41:25" (1/3) ... [2018-11-12 18:41:32,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470aa34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:41:32, skipping insertion in model container [2018-11-12 18:41:32,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:41:27" (2/3) ... [2018-11-12 18:41:32,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470aa34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:41:32, skipping insertion in model container [2018-11-12 18:41:32,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:41:32" (3/3) ... [2018-11-12 18:41:32,393 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label46_true-unreach-call.c [2018-11-12 18:41:32,403 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:41:32,416 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:41:32,440 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:41:32,480 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:41:32,480 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:41:32,480 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:41:32,480 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:41:32,481 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:41:32,481 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:41:32,481 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:41:32,481 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:41:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 18:41:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-12 18:41:32,529 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:32,530 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:41:32,534 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:32,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:32,541 INFO L82 PathProgramCache]: Analyzing trace with hash 992823241, now seen corresponding path program 1 times [2018-11-12 18:41:32,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:32,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:32,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:32,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:32,601 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:33,040 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 18:41:33,156 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 18:41:33,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:41:33,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 18:41:33,159 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:41:33,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:41:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:41:33,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:41:33,184 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-11-12 18:41:35,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:35,420 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-11-12 18:41:35,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:41:35,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2018-11-12 18:41:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:35,444 INFO L225 Difference]: With dead ends: 782 [2018-11-12 18:41:35,445 INFO L226 Difference]: Without dead ends: 487 [2018-11-12 18:41:35,454 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 18:41:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-11-12 18:41:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-11-12 18:41:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-11-12 18:41:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-11-12 18:41:35,550 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 69 [2018-11-12 18:41:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:35,551 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-11-12 18:41:35,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:41:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-11-12 18:41:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-12 18:41:35,561 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:35,561 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:41:35,562 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:35,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash 742048031, now seen corresponding path program 1 times [2018-11-12 18:41:35,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:35,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:35,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:35,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:35,564 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:41:36,131 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:41:36,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 18:41:36,132 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:41:36,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:41:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:41:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:41:36,135 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-11-12 18:41:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:42,143 INFO L93 Difference]: Finished difference Result 1759 states and 3238 transitions. [2018-11-12 18:41:42,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 18:41:42,155 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2018-11-12 18:41:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:42,172 INFO L225 Difference]: With dead ends: 1759 [2018-11-12 18:41:42,173 INFO L226 Difference]: Without dead ends: 1283 [2018-11-12 18:41:42,178 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-12 18:41:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2018-11-12 18:41:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1037. [2018-11-12 18:41:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-11-12 18:41:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1685 transitions. [2018-11-12 18:41:42,267 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1685 transitions. Word has length 144 [2018-11-12 18:41:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:42,267 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 1685 transitions. [2018-11-12 18:41:42,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:41:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1685 transitions. [2018-11-12 18:41:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-12 18:41:42,279 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:42,280 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:41:42,280 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:42,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:42,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1965616979, now seen corresponding path program 1 times [2018-11-12 18:41:42,282 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:42,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:42,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:42,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:42,284 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:42,605 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 18:41:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 124 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 18:41:43,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:43,003 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:43,004 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-12 18:41:43,007 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [514], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:41:43,054 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:43,055 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:43,602 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:41:43,603 INFO L272 AbstractInterpreter]: Visited 80 different actions 80 times. Never merged. Never widened. Performed 825 root evaluator evaluations with a maximum evaluation depth of 6. Performed 825 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 28 variables. [2018-11-12 18:41:43,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:43,617 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:41:44,187 INFO L227 lantSequenceWeakener]: Weakened 208 states. On average, predicates are now at 73.88% of their original sizes. [2018-11-12 18:41:44,187 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:41:44,555 INFO L415 sIntCurrentIteration]: We unified 216 AI predicates to 216 [2018-11-12 18:41:44,556 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:41:44,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:41:44,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-12 18:41:44,557 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:41:44,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:41:44,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:41:44,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:41:44,561 INFO L87 Difference]: Start difference. First operand 1037 states and 1685 transitions. Second operand 7 states. [2018-11-12 18:41:48,072 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:04,531 INFO L93 Difference]: Finished difference Result 2260 states and 3574 transitions. [2018-11-12 18:42:04,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:42:04,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2018-11-12 18:42:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:04,538 INFO L225 Difference]: With dead ends: 2260 [2018-11-12 18:42:04,538 INFO L226 Difference]: Without dead ends: 1229 [2018-11-12 18:42:04,541 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 217 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:42:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2018-11-12 18:42:04,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1227. [2018-11-12 18:42:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2018-11-12 18:42:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1883 transitions. [2018-11-12 18:42:04,578 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1883 transitions. Word has length 217 [2018-11-12 18:42:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:04,578 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 1883 transitions. [2018-11-12 18:42:04,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:42:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1883 transitions. [2018-11-12 18:42:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-12 18:42:04,584 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:04,584 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:04,585 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:04,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash -645920121, now seen corresponding path program 1 times [2018-11-12 18:42:04,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:04,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:04,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:04,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:04,587 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-12 18:42:05,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:05,042 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:42:05,042 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 262 with the following transitions: [2018-11-12 18:42:05,043 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:42:05,048 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:42:05,049 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:42:05,169 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:05,414 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:42:05,414 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Performed 3011 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3011 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:42:05,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:05,455 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:42:05,923 INFO L227 lantSequenceWeakener]: Weakened 258 states. On average, predicates are now at 73.77% of their original sizes. [2018-11-12 18:42:05,923 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:42:06,459 INFO L415 sIntCurrentIteration]: We unified 260 AI predicates to 260 [2018-11-12 18:42:06,459 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:42:06,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:42:06,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-12 18:42:06,460 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:42:06,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:42:06,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:42:06,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:42:06,463 INFO L87 Difference]: Start difference. First operand 1227 states and 1883 transitions. Second operand 11 states. [2018-11-12 18:42:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:23,822 INFO L93 Difference]: Finished difference Result 2453 states and 3929 transitions. [2018-11-12 18:42:23,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:42:23,823 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 261 [2018-11-12 18:42:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:23,832 INFO L225 Difference]: With dead ends: 2453 [2018-11-12 18:42:23,832 INFO L226 Difference]: Without dead ends: 1422 [2018-11-12 18:42:23,836 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 269 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:42:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2018-11-12 18:42:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1418. [2018-11-12 18:42:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2018-11-12 18:42:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2090 transitions. [2018-11-12 18:42:23,876 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2090 transitions. Word has length 261 [2018-11-12 18:42:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:23,877 INFO L480 AbstractCegarLoop]: Abstraction has 1418 states and 2090 transitions. [2018-11-12 18:42:23,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:42:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2090 transitions. [2018-11-12 18:42:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-11-12 18:42:23,882 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:23,882 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:23,883 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:23,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:23,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1266277691, now seen corresponding path program 1 times [2018-11-12 18:42:23,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:23,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:23,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:23,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:23,885 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:24,233 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-12 18:42:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:42:24,282 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:42:24,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:42:24,282 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:42:24,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:42:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:42:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:42:24,284 INFO L87 Difference]: Start difference. First operand 1418 states and 2090 transitions. Second operand 4 states. [2018-11-12 18:42:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:26,718 INFO L93 Difference]: Finished difference Result 3943 states and 6559 transitions. [2018-11-12 18:42:26,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:42:26,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 271 [2018-11-12 18:42:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:26,748 INFO L225 Difference]: With dead ends: 3943 [2018-11-12 18:42:26,748 INFO L226 Difference]: Without dead ends: 2912 [2018-11-12 18:42:26,757 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:42:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2018-11-12 18:42:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2896. [2018-11-12 18:42:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2896 states. [2018-11-12 18:42:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4414 transitions. [2018-11-12 18:42:26,840 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4414 transitions. Word has length 271 [2018-11-12 18:42:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:26,841 INFO L480 AbstractCegarLoop]: Abstraction has 2896 states and 4414 transitions. [2018-11-12 18:42:26,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:42:26,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4414 transitions. [2018-11-12 18:42:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-11-12 18:42:26,852 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:26,853 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:26,853 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:26,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1291753869, now seen corresponding path program 1 times [2018-11-12 18:42:26,854 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:26,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:26,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:26,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:26,855 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:27,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:27,461 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:42:27,461 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 288 with the following transitions: [2018-11-12 18:42:27,461 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [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], [578], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:42:27,475 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:42:27,476 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:42:27,614 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:27,951 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:42:27,951 INFO L272 AbstractInterpreter]: Visited 135 different actions 392 times. Merged at 5 different actions 9 times. Never widened. Performed 5051 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5051 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:42:27,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:27,957 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:42:28,331 INFO L227 lantSequenceWeakener]: Weakened 284 states. On average, predicates are now at 73.7% of their original sizes. [2018-11-12 18:42:28,331 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:42:28,463 INFO L415 sIntCurrentIteration]: We unified 286 AI predicates to 286 [2018-11-12 18:42:28,463 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:42:28,464 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:42:28,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-12 18:42:28,464 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:42:28,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:42:28,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:42:28,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:42:28,465 INFO L87 Difference]: Start difference. First operand 2896 states and 4414 transitions. Second operand 11 states. [2018-11-12 18:42:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:38,280 INFO L93 Difference]: Finished difference Result 5796 states and 9172 transitions. [2018-11-12 18:42:38,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:42:38,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 287 [2018-11-12 18:42:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:38,295 INFO L225 Difference]: With dead ends: 5796 [2018-11-12 18:42:38,295 INFO L226 Difference]: Without dead ends: 3287 [2018-11-12 18:42:38,307 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 296 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:42:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2018-11-12 18:42:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 3281. [2018-11-12 18:42:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3281 states. [2018-11-12 18:42:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3281 states to 3281 states and 4855 transitions. [2018-11-12 18:42:38,381 INFO L78 Accepts]: Start accepts. Automaton has 3281 states and 4855 transitions. Word has length 287 [2018-11-12 18:42:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:38,382 INFO L480 AbstractCegarLoop]: Abstraction has 3281 states and 4855 transitions. [2018-11-12 18:42:38,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:42:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3281 states and 4855 transitions. [2018-11-12 18:42:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-11-12 18:42:38,393 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:38,393 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:38,394 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:38,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:38,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2092355643, now seen corresponding path program 1 times [2018-11-12 18:42:38,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:38,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:38,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:38,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:38,395 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 129 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-12 18:42:38,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:38,760 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:42:38,760 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 293 with the following transitions: [2018-11-12 18:42:38,761 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [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], [578], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:42:38,765 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:42:38,766 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:42:38,860 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:40,001 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:42:40,001 INFO L272 AbstractInterpreter]: Visited 141 different actions 828 times. Merged at 7 different actions 39 times. Widened at 1 different actions 1 times. Performed 13289 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13289 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:42:40,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:40,011 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:42:40,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:40,011 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 18:42:40,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:40,022 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:42:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:40,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:42:40,642 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-11-12 18:42:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:40,729 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:42:41,108 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 18:42:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:41,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:42:41,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2018-11-12 18:42:41,545 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:42:41,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:42:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:42:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-12 18:42:41,548 INFO L87 Difference]: Start difference. First operand 3281 states and 4855 transitions. Second operand 11 states. [2018-11-12 18:42:42,570 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-12 18:42:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:57,070 INFO L93 Difference]: Finished difference Result 21421 states and 38479 transitions. [2018-11-12 18:42:57,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-12 18:42:57,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 292 [2018-11-12 18:42:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:57,225 INFO L225 Difference]: With dead ends: 21421 [2018-11-12 18:42:57,225 INFO L226 Difference]: Without dead ends: 18526 [2018-11-12 18:42:57,299 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 609 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=946, Invalid=4024, Unknown=0, NotChecked=0, Total=4970 [2018-11-12 18:42:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18526 states. [2018-11-12 18:42:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18526 to 17791. [2018-11-12 18:42:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17791 states. [2018-11-12 18:42:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17791 states to 17791 states and 27680 transitions. [2018-11-12 18:42:58,028 INFO L78 Accepts]: Start accepts. Automaton has 17791 states and 27680 transitions. Word has length 292 [2018-11-12 18:42:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:58,028 INFO L480 AbstractCegarLoop]: Abstraction has 17791 states and 27680 transitions. [2018-11-12 18:42:58,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:42:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 17791 states and 27680 transitions. [2018-11-12 18:42:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-11-12 18:42:58,071 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:58,071 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:58,071 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:58,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash 625405564, now seen corresponding path program 1 times [2018-11-12 18:42:58,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:58,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:58,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:58,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:58,073 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-12 18:42:59,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:59,049 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:42:59,049 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 302 with the following transitions: [2018-11-12 18:42:59,049 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [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], [614], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:42:59,053 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:42:59,054 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:42:59,128 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:59,648 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:42:59,648 INFO L272 AbstractInterpreter]: Visited 140 different actions 407 times. Merged at 5 different actions 9 times. Never widened. Performed 6211 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6211 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:42:59,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:59,652 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:43:00,106 INFO L227 lantSequenceWeakener]: Weakened 298 states. On average, predicates are now at 73.71% of their original sizes. [2018-11-12 18:43:00,106 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:43:00,322 INFO L415 sIntCurrentIteration]: We unified 300 AI predicates to 300 [2018-11-12 18:43:00,322 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:43:00,323 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:43:00,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2018-11-12 18:43:00,323 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:00,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 18:43:00,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 18:43:00,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-12 18:43:00,325 INFO L87 Difference]: Start difference. First operand 17791 states and 27680 transitions. Second operand 13 states. [2018-11-12 18:43:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:15,573 INFO L93 Difference]: Finished difference Result 34639 states and 54396 transitions. [2018-11-12 18:43:15,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:43:15,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 301 [2018-11-12 18:43:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:15,680 INFO L225 Difference]: With dead ends: 34639 [2018-11-12 18:43:15,680 INFO L226 Difference]: Without dead ends: 17997 [2018-11-12 18:43:15,766 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 310 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-12 18:43:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17997 states. [2018-11-12 18:43:16,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17997 to 17991. [2018-11-12 18:43:16,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17991 states. [2018-11-12 18:43:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17991 states to 17991 states and 27887 transitions. [2018-11-12 18:43:16,305 INFO L78 Accepts]: Start accepts. Automaton has 17991 states and 27887 transitions. Word has length 301 [2018-11-12 18:43:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:16,305 INFO L480 AbstractCegarLoop]: Abstraction has 17991 states and 27887 transitions. [2018-11-12 18:43:16,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-12 18:43:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 17991 states and 27887 transitions. [2018-11-12 18:43:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-11-12 18:43:16,355 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:16,356 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:43:16,356 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:16,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash -377511023, now seen corresponding path program 1 times [2018-11-12 18:43:16,357 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:16,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:16,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:16,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:16,358 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:43:16,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:16,923 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:16,923 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 318 with the following transitions: [2018-11-12 18:43:16,923 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [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], [614], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:43:16,927 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:16,928 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:17,066 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:17,607 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:43:17,608 INFO L272 AbstractInterpreter]: Visited 156 different actions 455 times. Merged at 5 different actions 9 times. Never widened. Performed 8594 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8594 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:43:17,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:17,616 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:43:18,224 INFO L227 lantSequenceWeakener]: Weakened 41 states. On average, predicates are now at 73.36% of their original sizes. [2018-11-12 18:43:18,225 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:43:18,485 INFO L415 sIntCurrentIteration]: We unified 316 AI predicates to 316 [2018-11-12 18:43:18,485 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:43:18,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:43:18,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [6] total 19 [2018-11-12 18:43:18,486 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:18,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-12 18:43:18,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-12 18:43:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-11-12 18:43:18,487 INFO L87 Difference]: Start difference. First operand 17991 states and 27887 transitions. Second operand 15 states. [2018-11-12 18:43:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:48,366 INFO L93 Difference]: Finished difference Result 35992 states and 56505 transitions. [2018-11-12 18:43:48,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-12 18:43:48,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 317 [2018-11-12 18:43:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:48,450 INFO L225 Difference]: With dead ends: 35992 [2018-11-12 18:43:48,450 INFO L226 Difference]: Without dead ends: 19159 [2018-11-12 18:43:48,529 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 326 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2018-11-12 18:43:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19159 states. [2018-11-12 18:43:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19159 to 19147. [2018-11-12 18:43:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19147 states. [2018-11-12 18:43:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19147 states to 19147 states and 29167 transitions. [2018-11-12 18:43:49,047 INFO L78 Accepts]: Start accepts. Automaton has 19147 states and 29167 transitions. Word has length 317 [2018-11-12 18:43:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:49,047 INFO L480 AbstractCegarLoop]: Abstraction has 19147 states and 29167 transitions. [2018-11-12 18:43:49,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-12 18:43:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 19147 states and 29167 transitions. [2018-11-12 18:43:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-11-12 18:43:49,121 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:49,121 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:43:49,122 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:49,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:49,122 INFO L82 PathProgramCache]: Analyzing trace with hash 308886860, now seen corresponding path program 1 times [2018-11-12 18:43:49,122 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:49,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:49,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:49,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:49,123 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:49,771 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 18:43:50,185 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-12 18:43:50,558 WARN L179 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-12 18:43:51,158 WARN L179 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-12 18:43:51,461 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-12 18:43:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 255 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:43:52,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:52,279 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:52,279 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 362 with the following transitions: [2018-11-12 18:43:52,280 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [846], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:43:52,283 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:52,283 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:52,390 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:54,119 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:43:54,119 INFO L272 AbstractInterpreter]: Visited 157 different actions 921 times. Merged at 7 different actions 36 times. Widened at 1 different actions 1 times. Performed 15061 root evaluator evaluations with a maximum evaluation depth of 6. Performed 15061 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:43:54,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:54,126 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:43:54,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:54,126 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 18:43:54,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:54,134 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:43:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:54,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:43:58,539 WARN L179 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2018-11-12 18:44:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:44:00,342 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:44:00,882 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-12 18:44:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:44:01,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:44:01,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 20 [2018-11-12 18:44:01,390 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:44:01,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 18:44:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 18:44:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=302, Unknown=1, NotChecked=0, Total=380 [2018-11-12 18:44:01,392 INFO L87 Difference]: Start difference. First operand 19147 states and 29167 transitions. Second operand 18 states. [2018-11-12 18:44:04,722 WARN L179 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2018-11-12 18:44:11,248 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2018-11-12 18:44:20,066 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2018-11-12 18:44:21,790 WARN L179 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2018-11-12 18:44:39,829 WARN L179 SmtUtils]: Spent 8.74 s on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-11-12 18:44:41,373 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2018-11-12 18:44:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:44:48,572 INFO L93 Difference]: Finished difference Result 62224 states and 120827 transitions. [2018-11-12 18:44:48,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-11-12 18:44:48,574 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 361 [2018-11-12 18:44:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:44:48,893 INFO L225 Difference]: With dead ends: 62224 [2018-11-12 18:44:48,894 INFO L226 Difference]: Without dead ends: 37958 [2018-11-12 18:44:49,270 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 733 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=2239, Invalid=8888, Unknown=3, NotChecked=0, Total=11130 [2018-11-12 18:44:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37958 states. [2018-11-12 18:44:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37958 to 36232. [2018-11-12 18:44:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36232 states. [2018-11-12 18:44:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36232 states to 36232 states and 51625 transitions. [2018-11-12 18:44:51,004 INFO L78 Accepts]: Start accepts. Automaton has 36232 states and 51625 transitions. Word has length 361 [2018-11-12 18:44:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:44:51,005 INFO L480 AbstractCegarLoop]: Abstraction has 36232 states and 51625 transitions. [2018-11-12 18:44:51,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 18:44:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 36232 states and 51625 transitions. [2018-11-12 18:44:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-11-12 18:44:51,038 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:44:51,039 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, 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, 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] [2018-11-12 18:44:51,039 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:44:51,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:51,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1205876074, now seen corresponding path program 1 times [2018-11-12 18:44:51,040 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:44:51,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:51,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:51,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:51,041 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:44:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 367 proven. 82 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-12 18:44:51,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:51,471 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:44:51,472 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 372 with the following transitions: [2018-11-12 18:44:51,472 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [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], [614], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:44:51,474 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:44:51,475 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:44:51,547 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:44:52,084 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:44:52,084 INFO L272 AbstractInterpreter]: Visited 127 different actions 622 times. Merged at 7 different actions 33 times. Widened at 1 different actions 1 times. Performed 8757 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8757 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:44:52,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:52,092 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:44:52,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:52,092 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 18:44:52,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:52,106 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:44:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:52,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:44:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:44:52,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:44:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:44:52,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:44:52,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-12 18:44:52,489 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:44:52,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 18:44:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 18:44:52,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:44:52,490 INFO L87 Difference]: Start difference. First operand 36232 states and 51625 transitions. Second operand 6 states. [2018-11-12 18:44:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:44:55,019 INFO L93 Difference]: Finished difference Result 73989 states and 113209 transitions. [2018-11-12 18:44:55,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:44:55,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 371 [2018-11-12 18:44:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:44:55,227 INFO L225 Difference]: With dead ends: 73989 [2018-11-12 18:44:55,227 INFO L226 Difference]: Without dead ends: 40449 [2018-11-12 18:44:55,371 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 743 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:44:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40449 states. [2018-11-12 18:44:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40449 to 37624. [2018-11-12 18:44:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37624 states. [2018-11-12 18:44:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37624 states to 37624 states and 47420 transitions. [2018-11-12 18:44:56,355 INFO L78 Accepts]: Start accepts. Automaton has 37624 states and 47420 transitions. Word has length 371 [2018-11-12 18:44:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:44:56,356 INFO L480 AbstractCegarLoop]: Abstraction has 37624 states and 47420 transitions. [2018-11-12 18:44:56,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 18:44:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 37624 states and 47420 transitions. [2018-11-12 18:44:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-11-12 18:44:56,414 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:44:56,414 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:44:56,415 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:44:56,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:56,415 INFO L82 PathProgramCache]: Analyzing trace with hash -479956902, now seen corresponding path program 1 times [2018-11-12 18:44:56,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:44:56,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:56,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:56,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:56,416 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:44:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 374 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:44:56,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:56,819 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:44:56,820 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 384 with the following transitions: [2018-11-12 18:44:56,820 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [614], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:44:56,823 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:44:56,823 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:44:56,983 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:44:57,775 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:44:57,776 INFO L272 AbstractInterpreter]: Visited 137 different actions 678 times. Merged at 8 different actions 41 times. Widened at 1 different actions 1 times. Performed 12037 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12037 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:44:57,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:57,777 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:44:57,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:57,777 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 18:44:57,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:57,786 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:44:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:57,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:44:58,156 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2018-11-12 18:44:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-11-12 18:44:58,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:44:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-11-12 18:44:59,414 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:44:59,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-12 18:44:59,414 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:44:59,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:44:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:44:59,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:44:59,415 INFO L87 Difference]: Start difference. First operand 37624 states and 47420 transitions. Second operand 3 states. [2018-11-12 18:45:01,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:45:01,293 INFO L93 Difference]: Finished difference Result 74981 states and 96254 transitions. [2018-11-12 18:45:01,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:45:01,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 383 [2018-11-12 18:45:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:45:01,462 INFO L225 Difference]: With dead ends: 74981 [2018-11-12 18:45:01,462 INFO L226 Difference]: Without dead ends: 40048 [2018-11-12 18:45:01,639 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 765 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:45:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40048 states. Received shutdown request... [2018-11-12 18:45:01,681 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 18:45:01,686 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 18:45:01,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 06:45:01 BoogieIcfgContainer [2018-11-12 18:45:01,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 18:45:01,688 INFO L168 Benchmark]: Toolchain (without parser) took 215691.05 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -190.6 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-11-12 18:45:01,689 INFO L168 Benchmark]: CDTParser took 0.22 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 18:45:01,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1024.80 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-12 18:45:01,690 INFO L168 Benchmark]: Boogie Procedure Inliner took 196.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -843.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2018-11-12 18:45:01,691 INFO L168 Benchmark]: Boogie Preprocessor took 152.31 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 18:45:01,691 INFO L168 Benchmark]: RCFGBuilder took 5011.10 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 191.0 MB). Peak memory consumption was 191.0 MB. Max. memory is 7.1 GB. [2018-11-12 18:45:01,692 INFO L168 Benchmark]: TraceAbstraction took 209301.47 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 398.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-11-12 18:45:01,699 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1024.80 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 196.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -843.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.31 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 5011.10 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 191.0 MB). Peak memory consumption was 191.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 209301.47 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 398.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 192]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 192). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 209.2s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 172.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3199 SDtfs, 18836 SDslu, 4092 SDs, 0 SdLazy, 37178 SolverSat, 7568 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 77.4s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 4487 GetRequests, 4189 SyntacticMatches, 11 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6232 ImplicationChecksByTransitivity, 32.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37624occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.4s AbstIntTime, 9 AbstIntIterations, 5 AbstIntStrong, 0.997835657193423 AbsIntWeakeningRatio, 0.102322206095791 AbsIntAvgWeakeningVarsNumRemoved, 22.209724238026126 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.9s AutomataMinimizationTime, 12 MinimizatonAttempts, 5583 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 4681 NumberOfCodeBlocks, 4681 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 6068 ConstructedInterpolants, 72 QuantifiedInterpolants, 9318837 SizeOfPredicates, 4 NumberOfNonLiveVariables, 2326 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5005/5527 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown