java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:29:59,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:29:59,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:29:59,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 18:29:59,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 18:29:59,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 18:29:59,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 18:29:59,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 18:29:59,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 18:29:59,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 18:29:59,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 18:29:59,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 18:29:59,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:29:59,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:29:59,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:29:59,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:29:59,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:29:59,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:29:59,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:29:59,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:29:59,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:29:59,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:29:59,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:29:59,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:29:59,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 18:29:59,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 18:29:59,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 18:29:59,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 18:29:59,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 18:29:59,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 18:29:59,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:29:59,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:29:59,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:29:59,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:29:59,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:29:59,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:29:59,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:29:59,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:29:59,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:29:59,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:29:59,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:29:59,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 18:29:59,440 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:29:59,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:29:59,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:29:59,441 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:29:59,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:29:59,442 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:29:59,442 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:29:59,442 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:29:59,442 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:29:59,442 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:29:59,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:29:59,443 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:29:59,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:29:59,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:29:59,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:29:59,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:29:59,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:29:59,445 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:29:59,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:29:59,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:29:59,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:29:59,445 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:29:59,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:29:59,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:29:59,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:29:59,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:29:59,447 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:29:59,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:29:59,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:29:59,447 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:29:59,475 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:29:59,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:29:59,491 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:29:59,493 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:29:59,494 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:29:59,497 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-09-09 18:29:59,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e71ef6b1/7719076f4e5542858f307d062261ecd6/FLAGfd1e86d4e [2019-09-09 18:30:00,200 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:30:00,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-09-09 18:30:00,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e71ef6b1/7719076f4e5542858f307d062261ecd6/FLAGfd1e86d4e [2019-09-09 18:30:00,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e71ef6b1/7719076f4e5542858f307d062261ecd6 [2019-09-09 18:30:00,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:30:00,466 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:30:00,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:30:00,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:30:00,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:30:00,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:30:00" (1/1) ... [2019-09-09 18:30:00,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e9ecad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:00, skipping insertion in model container [2019-09-09 18:30:00,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:30:00" (1/1) ... [2019-09-09 18:30:00,482 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:30:00,541 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:30:01,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:30:01,088 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:30:01,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:30:01,269 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:30:01,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01 WrapperNode [2019-09-09 18:30:01,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:30:01,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:30:01,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:30:01,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:30:01,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01" (1/1) ... [2019-09-09 18:30:01,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01" (1/1) ... [2019-09-09 18:30:01,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01" (1/1) ... [2019-09-09 18:30:01,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01" (1/1) ... [2019-09-09 18:30:01,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01" (1/1) ... [2019-09-09 18:30:01,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01" (1/1) ... [2019-09-09 18:30:01,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01" (1/1) ... [2019-09-09 18:30:01,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:30:01,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:30:01,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:30:01,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:30:01,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01" (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 [2019-09-09 18:30:01,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:30:01,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:30:01,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:30:01,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:30:01,495 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:30:01,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:30:01,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:30:01,495 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:30:01,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:30:01,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:30:01,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:30:02,945 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:30:02,948 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:30:02,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:30:02 BoogieIcfgContainer [2019-09-09 18:30:02,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:30:02,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:30:02,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:30:02,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:30:02,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:30:00" (1/3) ... [2019-09-09 18:30:02,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9e2d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:30:02, skipping insertion in model container [2019-09-09 18:30:02,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:01" (2/3) ... [2019-09-09 18:30:02,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9e2d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:30:02, skipping insertion in model container [2019-09-09 18:30:02,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:30:02" (3/3) ... [2019-09-09 18:30:02,969 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label45.c [2019-09-09 18:30:02,981 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:30:02,988 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:30:03,005 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:30:03,037 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:30:03,038 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:30:03,038 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:30:03,038 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:30:03,038 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:30:03,038 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:30:03,039 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:30:03,039 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:30:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:30:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-09 18:30:03,101 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:03,102 INFO L399 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] [2019-09-09 18:30:03,104 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1020079963, now seen corresponding path program 1 times [2019-09-09 18:30:03,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:03,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:03,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:03,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:03,159 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:03,487 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:03,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:30:03,488 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:03,496 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:30:03,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:30:03,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:03,521 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-09-09 18:30:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:05,631 INFO L93 Difference]: Finished difference Result 642 states and 849 transitions. [2019-09-09 18:30:05,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:30:05,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-09-09 18:30:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:05,654 INFO L225 Difference]: With dead ends: 642 [2019-09-09 18:30:05,655 INFO L226 Difference]: Without dead ends: 554 [2019-09-09 18:30:05,657 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-09-09 18:30:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 372. [2019-09-09 18:30:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:30:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-09-09 18:30:05,735 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 42 [2019-09-09 18:30:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:05,736 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-09-09 18:30:05,736 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:30:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-09-09 18:30:05,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-09 18:30:05,742 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:05,743 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:30:05,743 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:05,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2050989129, now seen corresponding path program 1 times [2019-09-09 18:30:05,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:05,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:05,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:05,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:05,745 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:05,950 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:05,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:30:05,951 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:05,953 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:30:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:30:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:05,954 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 4 states. [2019-09-09 18:30:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:07,564 INFO L93 Difference]: Finished difference Result 1100 states and 1417 transitions. [2019-09-09 18:30:07,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:30:07,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-09-09 18:30:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:07,571 INFO L225 Difference]: With dead ends: 1100 [2019-09-09 18:30:07,571 INFO L226 Difference]: Without dead ends: 736 [2019-09-09 18:30:07,572 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-09-09 18:30:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 554. [2019-09-09 18:30:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-09-09 18:30:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 809 transitions. [2019-09-09 18:30:07,615 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 809 transitions. Word has length 125 [2019-09-09 18:30:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:07,616 INFO L475 AbstractCegarLoop]: Abstraction has 554 states and 809 transitions. [2019-09-09 18:30:07,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:30:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 809 transitions. [2019-09-09 18:30:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-09 18:30:07,626 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:07,626 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:30:07,626 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash 488627185, now seen corresponding path program 1 times [2019-09-09 18:30:07,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:07,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:07,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:07,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:07,629 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:07,838 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:07,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:30:07,838 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:07,839 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:30:07,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:30:07,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:07,840 INFO L87 Difference]: Start difference. First operand 554 states and 809 transitions. Second operand 4 states. [2019-09-09 18:30:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:09,284 INFO L93 Difference]: Finished difference Result 1646 states and 2286 transitions. [2019-09-09 18:30:09,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:30:09,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-09-09 18:30:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:09,295 INFO L225 Difference]: With dead ends: 1646 [2019-09-09 18:30:09,295 INFO L226 Difference]: Without dead ends: 1646 [2019-09-09 18:30:09,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-09-09 18:30:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-09-09 18:30:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-09-09 18:30:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2286 transitions. [2019-09-09 18:30:09,354 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2286 transitions. Word has length 137 [2019-09-09 18:30:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:09,355 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2286 transitions. [2019-09-09 18:30:09,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:30:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2286 transitions. [2019-09-09 18:30:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-09-09 18:30:09,364 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:09,364 INFO L399 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 18:30:09,364 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:09,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1957605909, now seen corresponding path program 1 times [2019-09-09 18:30:09,365 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:09,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:09,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:09,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:09,367 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:09,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:30:09,671 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:30:09,673 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 257 with the following transitions: [2019-09-09 18:30:09,676 INFO L207 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:30:09,723 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:30:09,724 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:30:20,444 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:30:20,447 INFO L272 AbstractInterpreter]: Visited 124 different actions 124 times. Never merged. Never widened. Performed 287 root evaluator evaluations with a maximum evaluation depth of 13. Performed 287 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:30:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:20,451 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:30:30,532 INFO L227 lantSequenceWeakener]: Weakened 237 states. On average, predicates are now at 77.85% of their original sizes. [2019-09-09 18:30:30,532 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:30:30,643 INFO L420 sIntCurrentIteration]: We unified 255 AI predicates to 255 [2019-09-09 18:30:30,643 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:30:30,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:30:30,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:30:30,645 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:30,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:30:30,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:30:30,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:30:30,647 INFO L87 Difference]: Start difference. First operand 1646 states and 2286 transitions. Second operand 11 states. [2019-09-09 18:32:02,457 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:33:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:33:59,260 INFO L93 Difference]: Finished difference Result 1650 states and 2261 transitions. [2019-09-09 18:33:59,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:33:59,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2019-09-09 18:33:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:33:59,272 INFO L225 Difference]: With dead ends: 1650 [2019-09-09 18:33:59,272 INFO L226 Difference]: Without dead ends: 1650 [2019-09-09 18:33:59,273 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 18:33:59,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2019-09-09 18:33:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1646. [2019-09-09 18:33:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-09-09 18:33:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2254 transitions. [2019-09-09 18:33:59,322 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2254 transitions. Word has length 256 [2019-09-09 18:33:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:33:59,323 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2254 transitions. [2019-09-09 18:33:59,323 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:33:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2254 transitions. [2019-09-09 18:33:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2019-09-09 18:33:59,330 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:33:59,330 INFO L399 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:33:59,331 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:33:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:33:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash 453969074, now seen corresponding path program 1 times [2019-09-09 18:33:59,331 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:33:59,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:33:59,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:33:59,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:33:59,334 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:33:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:34:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 191 proven. 173 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:34:00,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:34:00,152 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:34:00,152 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 341 with the following transitions: [2019-09-09 18:34:00,153 INFO L207 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:34:00,159 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:34:00,159 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:34:12,990 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:34:12,991 INFO L272 AbstractInterpreter]: Visited 128 different actions 251 times. Merged at 4 different actions 5 times. Never widened. Performed 505 root evaluator evaluations with a maximum evaluation depth of 13. Performed 505 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:34:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:34:12,992 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:34:17,682 INFO L227 lantSequenceWeakener]: Weakened 337 states. On average, predicates are now at 77.61% of their original sizes. [2019-09-09 18:34:17,682 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:34:17,777 INFO L420 sIntCurrentIteration]: We unified 339 AI predicates to 339 [2019-09-09 18:34:17,777 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:34:17,777 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:34:17,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:34:17,778 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:34:17,779 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:34:17,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:34:17,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:34:17,780 INFO L87 Difference]: Start difference. First operand 1646 states and 2254 transitions. Second operand 11 states. [2019-09-09 18:34:58,042 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:37:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:37:31,474 INFO L93 Difference]: Finished difference Result 1862 states and 2470 transitions. [2019-09-09 18:37:31,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:37:31,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 340 [2019-09-09 18:37:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:37:31,484 INFO L225 Difference]: With dead ends: 1862 [2019-09-09 18:37:31,484 INFO L226 Difference]: Without dead ends: 1647 [2019-09-09 18:37:31,485 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:37:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2019-09-09 18:37:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1646. [2019-09-09 18:37:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-09-09 18:37:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2248 transitions. [2019-09-09 18:37:31,526 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2248 transitions. Word has length 340 [2019-09-09 18:37:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:37:31,527 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2248 transitions. [2019-09-09 18:37:31,527 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:37:31,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2248 transitions. [2019-09-09 18:37:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2019-09-09 18:37:31,535 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:37:31,535 INFO L399 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:37:31,536 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:37:31,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:37:31,536 INFO L82 PathProgramCache]: Analyzing trace with hash -62362146, now seen corresponding path program 1 times [2019-09-09 18:37:31,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:37:31,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:37:31,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:37:31,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:37:31,538 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:37:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:37:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 202 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:37:32,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:37:32,556 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:37:32,556 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 367 with the following transitions: [2019-09-09 18:37:32,563 INFO L207 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:37:32,581 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:37:32,581 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:37:49,185 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:37:49,186 INFO L272 AbstractInterpreter]: Visited 128 different actions 251 times. Merged at 4 different actions 5 times. Never widened. Performed 593 root evaluator evaluations with a maximum evaluation depth of 13. Performed 593 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:37:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:37:49,186 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:38:02,075 INFO L227 lantSequenceWeakener]: Weakened 363 states. On average, predicates are now at 77.59% of their original sizes. [2019-09-09 18:38:02,075 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:38:02,170 INFO L420 sIntCurrentIteration]: We unified 365 AI predicates to 365 [2019-09-09 18:38:02,170 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:38:02,170 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:38:02,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2019-09-09 18:38:02,171 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:38:02,171 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:38:02,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:38:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:38:02,173 INFO L87 Difference]: Start difference. First operand 1646 states and 2248 transitions. Second operand 11 states. [2019-09-09 18:38:42,807 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:39:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:39:44,379 INFO L93 Difference]: Finished difference Result 1832 states and 2441 transitions. [2019-09-09 18:39:44,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:39:44,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 366 [2019-09-09 18:39:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:39:44,388 INFO L225 Difference]: With dead ends: 1832 [2019-09-09 18:39:44,388 INFO L226 Difference]: Without dead ends: 1832 [2019-09-09 18:39:44,389 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:39:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2019-09-09 18:39:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1830. [2019-09-09 18:39:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1830 states. [2019-09-09 18:39:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2439 transitions. [2019-09-09 18:39:44,430 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2439 transitions. Word has length 366 [2019-09-09 18:39:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:39:44,431 INFO L475 AbstractCegarLoop]: Abstraction has 1830 states and 2439 transitions. [2019-09-09 18:39:44,431 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:39:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2439 transitions. [2019-09-09 18:39:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2019-09-09 18:39:44,439 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:44,440 INFO L399 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:39:44,440 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:44,440 INFO L82 PathProgramCache]: Analyzing trace with hash 501990874, now seen corresponding path program 1 times [2019-09-09 18:39:44,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:44,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:44,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:44,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:44,442 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 241 proven. 124 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 18:39:44,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:39:44,986 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:39:44,986 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 381 with the following transitions: [2019-09-09 18:39:44,987 INFO L207 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:39:44,994 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:39:44,995 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:39:59,606 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:40:21,503 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:40:21,504 INFO L272 AbstractInterpreter]: Visited 128 different actions 501 times. Merged at 6 different actions 19 times. Never widened. Performed 920 root evaluator evaluations with a maximum evaluation depth of 22. Performed 920 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:40:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:40:21,504 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:40:31,977 INFO L227 lantSequenceWeakener]: Weakened 377 states. On average, predicates are now at 77.58% of their original sizes. [2019-09-09 18:40:31,977 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:40:32,054 INFO L420 sIntCurrentIteration]: We unified 379 AI predicates to 379 [2019-09-09 18:40:32,054 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:40:32,054 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:40:32,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:40:32,055 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:40:32,055 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:40:32,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:40:32,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:40:32,056 INFO L87 Difference]: Start difference. First operand 1830 states and 2439 transitions. Second operand 10 states. [2019-09-09 18:41:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:41:57,510 INFO L93 Difference]: Finished difference Result 2388 states and 3069 transitions. [2019-09-09 18:41:57,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-09 18:41:57,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 380 [2019-09-09 18:41:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:41:57,521 INFO L225 Difference]: With dead ends: 2388 [2019-09-09 18:41:57,522 INFO L226 Difference]: Without dead ends: 2388 [2019-09-09 18:41:57,522 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:41:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2019-09-09 18:41:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2200. [2019-09-09 18:41:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2200 states. [2019-09-09 18:41:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 2873 transitions. [2019-09-09 18:41:57,570 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 2873 transitions. Word has length 380 [2019-09-09 18:41:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:41:57,570 INFO L475 AbstractCegarLoop]: Abstraction has 2200 states and 2873 transitions. [2019-09-09 18:41:57,571 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:41:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 2873 transitions. [2019-09-09 18:41:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2019-09-09 18:41:57,583 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:41:57,583 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-09-09 18:41:57,583 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:41:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:41:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash 610309694, now seen corresponding path program 1 times [2019-09-09 18:41:57,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:41:57,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:41:57,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:41:57,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:41:57,586 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:41:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:41:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 246 proven. 451 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:41:58,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:41:58,393 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:41:58,394 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 454 with the following transitions: [2019-09-09 18:41:58,394 INFO L207 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:41:58,397 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:41:58,397 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:42:19,210 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:42:19,211 INFO L272 AbstractInterpreter]: Visited 129 different actions 378 times. Merged at 6 different actions 11 times. Never widened. Performed 754 root evaluator evaluations with a maximum evaluation depth of 13. Performed 754 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 3 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:42:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:42:19,211 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:42:25,330 INFO L227 lantSequenceWeakener]: Weakened 450 states. On average, predicates are now at 77.54% of their original sizes. [2019-09-09 18:42:25,330 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:42:25,395 INFO L420 sIntCurrentIteration]: We unified 452 AI predicates to 452 [2019-09-09 18:42:25,396 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:42:25,396 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:42:25,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2019-09-09 18:42:25,397 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:42:25,397 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:42:25,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:42:25,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:42:25,398 INFO L87 Difference]: Start difference. First operand 2200 states and 2873 transitions. Second operand 10 states. [2019-09-09 18:42:59,093 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:44:14,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:44:14,489 INFO L93 Difference]: Finished difference Result 2569 states and 3249 transitions. [2019-09-09 18:44:14,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:44:14,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 453 [2019-09-09 18:44:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:44:14,499 INFO L225 Difference]: With dead ends: 2569 [2019-09-09 18:44:14,499 INFO L226 Difference]: Without dead ends: 2384 [2019-09-09 18:44:14,500 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-09-09 18:44:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2019-09-09 18:44:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2382. [2019-09-09 18:44:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2382 states. [2019-09-09 18:44:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 3057 transitions. [2019-09-09 18:44:14,553 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 3057 transitions. Word has length 453 [2019-09-09 18:44:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:44:14,554 INFO L475 AbstractCegarLoop]: Abstraction has 2382 states and 3057 transitions. [2019-09-09 18:44:14,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:44:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 3057 transitions. [2019-09-09 18:44:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2019-09-09 18:44:14,562 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:44:14,563 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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] [2019-09-09 18:44:14,563 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:44:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:44:14,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1023278258, now seen corresponding path program 1 times [2019-09-09 18:44:14,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:44:14,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:14,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:44:14,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:14,565 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:44:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:44:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 368 proven. 119 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-09-09 18:44:15,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:44:15,057 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:44:15,058 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 540 with the following transitions: [2019-09-09 18:44:15,058 INFO L207 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:44:15,061 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:44:15,062 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)