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/Problem18_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:16:08,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:16:08,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:16:08,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 22:16:08,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 22:16:08,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 22:16:08,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 22:16:08,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 22:16:08,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 22:16:08,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 22:16:08,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 22:16:08,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 22:16:08,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 22:16:08,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 22:16:08,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 22:16:08,441 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 22:16:08,457 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:16:08,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:16:08,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:16:08,459 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:16:08,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:16:08,459 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:16:08,460 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:16:08,460 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:16:08,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:16:08,460 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:16:08,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:16:08,461 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:16:08,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:16:08,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:16:08,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:16:08,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:16:08,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:16:08,463 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:16:08,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:16:08,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:16:08,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:16:08,464 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:16:08,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:16:08,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:16:08,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:16:08,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:16:08,465 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:16:08,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:16:08,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:16:08,466 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:16:08,496 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:16:08,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:16:08,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:16:08,515 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:16:08,516 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:16:08,517 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label24.c [2019-09-09 22:16:08,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d581a02fe/bebc0610369d46adb73797a1ba7e225e/FLAG70fd3677f [2019-09-09 22:16:09,275 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:16:09,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label24.c [2019-09-09 22:16:09,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d581a02fe/bebc0610369d46adb73797a1ba7e225e/FLAG70fd3677f [2019-09-09 22:16:09,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d581a02fe/bebc0610369d46adb73797a1ba7e225e [2019-09-09 22:16:09,418 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:16:09,420 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:16:09,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:16:09,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:16:09,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:16:09,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:16:09" (1/1) ... [2019-09-09 22:16:09,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87a0d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:09, skipping insertion in model container [2019-09-09 22:16:09,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:16:09" (1/1) ... [2019-09-09 22:16:09,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:16:09,565 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:16:10,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:16:10,781 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:16:11,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:16:11,229 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:16:11,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11 WrapperNode [2019-09-09 22:16:11,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:16:11,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:16:11,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:16:11,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:16:11,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11" (1/1) ... [2019-09-09 22:16:11,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11" (1/1) ... [2019-09-09 22:16:11,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11" (1/1) ... [2019-09-09 22:16:11,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11" (1/1) ... [2019-09-09 22:16:11,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11" (1/1) ... [2019-09-09 22:16:11,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11" (1/1) ... [2019-09-09 22:16:11,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11" (1/1) ... [2019-09-09 22:16:11,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:16:11,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:16:11,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:16:11,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:16:11,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11" (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 22:16:11,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:16:11,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:16:11,577 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:16:11,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:16:11,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:16:11,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:16:11,578 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:16:11,578 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:16:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:16:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:16:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:16:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:16:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:16:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:16:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:16:15,376 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:16:15,377 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:16:15,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:16:15 BoogieIcfgContainer [2019-09-09 22:16:15,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:16:15,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:16:15,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:16:15,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:16:15,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:16:09" (1/3) ... [2019-09-09 22:16:15,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c28ebe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:16:15, skipping insertion in model container [2019-09-09 22:16:15,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:16:11" (2/3) ... [2019-09-09 22:16:15,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c28ebe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:16:15, skipping insertion in model container [2019-09-09 22:16:15,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:16:15" (3/3) ... [2019-09-09 22:16:15,387 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label24.c [2019-09-09 22:16:15,397 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:16:15,406 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:16:15,422 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:16:15,449 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:16:15,449 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:16:15,449 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:16:15,449 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:16:15,449 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:16:15,450 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:16:15,450 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:16:15,450 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:16:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:16:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-09 22:16:15,496 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:16:15,497 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:16:15,499 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:16:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:16:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash -990352286, now seen corresponding path program 1 times [2019-09-09 22:16:15,507 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:16:15,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:15,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:16:15,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:15,555 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:16:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:16:15,842 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 22:16:15,844 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:16:15,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:16:15,845 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:16:15,851 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:16:15,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:16:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:16:15,869 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:16:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:16:20,203 INFO L93 Difference]: Finished difference Result 1480 states and 2746 transitions. [2019-09-09 22:16:20,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:16:20,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-09-09 22:16:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:16:20,237 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:16:20,237 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:16:20,238 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:16:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:16:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:16:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:16:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-09-09 22:16:20,370 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 57 [2019-09-09 22:16:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:16:20,370 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-09-09 22:16:20,371 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:16:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-09-09 22:16:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-09 22:16:20,376 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:16:20,376 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, 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] [2019-09-09 22:16:20,377 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:16:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:16:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1173777081, now seen corresponding path program 1 times [2019-09-09 22:16:20,377 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:16:20,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:20,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:16:20,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:20,379 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:16:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:16:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:16:20,565 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:16:20,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:16:20,565 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:16:20,567 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:16:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:16:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:16:20,568 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 5 states. [2019-09-09 22:16:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:16:25,990 INFO L93 Difference]: Finished difference Result 2885 states and 4979 transitions. [2019-09-09 22:16:25,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:16:25,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2019-09-09 22:16:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:16:26,012 INFO L225 Difference]: With dead ends: 2885 [2019-09-09 22:16:26,012 INFO L226 Difference]: Without dead ends: 2885 [2019-09-09 22:16:26,013 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 22:16:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-09-09 22:16:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2861. [2019-09-09 22:16:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2019-09-09 22:16:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4925 transitions. [2019-09-09 22:16:26,094 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4925 transitions. Word has length 126 [2019-09-09 22:16:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:16:26,094 INFO L475 AbstractCegarLoop]: Abstraction has 2861 states and 4925 transitions. [2019-09-09 22:16:26,095 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:16:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4925 transitions. [2019-09-09 22:16:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-09 22:16:26,097 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:16:26,097 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, 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] [2019-09-09 22:16:26,098 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:16:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:16:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1498724582, now seen corresponding path program 1 times [2019-09-09 22:16:26,098 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:16:26,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:26,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:16:26,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:26,100 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:16:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:16:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:16:26,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:16:26,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:16:26,268 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:16:26,270 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:16:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:16:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:16:26,271 INFO L87 Difference]: Start difference. First operand 2861 states and 4925 transitions. Second operand 5 states. [2019-09-09 22:16:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:16:31,381 INFO L93 Difference]: Finished difference Result 4356 states and 6168 transitions. [2019-09-09 22:16:31,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:16:31,383 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2019-09-09 22:16:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:16:31,406 INFO L225 Difference]: With dead ends: 4356 [2019-09-09 22:16:31,406 INFO L226 Difference]: Without dead ends: 4356 [2019-09-09 22:16:31,407 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 22:16:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2019-09-09 22:16:31,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 4325. [2019-09-09 22:16:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4325 states. [2019-09-09 22:16:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 6079 transitions. [2019-09-09 22:16:31,577 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 6079 transitions. Word has length 127 [2019-09-09 22:16:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:16:31,579 INFO L475 AbstractCegarLoop]: Abstraction has 4325 states and 6079 transitions. [2019-09-09 22:16:31,579 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:16:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 6079 transitions. [2019-09-09 22:16:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-09-09 22:16:31,589 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:16:31,589 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, 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] [2019-09-09 22:16:31,589 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:16:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:16:31,590 INFO L82 PathProgramCache]: Analyzing trace with hash -335890806, now seen corresponding path program 1 times [2019-09-09 22:16:31,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:16:31,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:31,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:16:31,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:31,592 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:16:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:16:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:16:31,715 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:16:31,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:16:31,715 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:16:31,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:16:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:16:31,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:16:31,718 INFO L87 Difference]: Start difference. First operand 4325 states and 6079 transitions. Second operand 5 states. [2019-09-09 22:16:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:16:37,666 INFO L93 Difference]: Finished difference Result 8953 states and 11701 transitions. [2019-09-09 22:16:37,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 22:16:37,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2019-09-09 22:16:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:16:37,707 INFO L225 Difference]: With dead ends: 8953 [2019-09-09 22:16:37,707 INFO L226 Difference]: Without dead ends: 8953 [2019-09-09 22:16:37,707 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 22:16:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8953 states. [2019-09-09 22:16:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8953 to 7346. [2019-09-09 22:16:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7346 states. [2019-09-09 22:16:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 9752 transitions. [2019-09-09 22:16:37,899 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 9752 transitions. Word has length 129 [2019-09-09 22:16:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:16:37,899 INFO L475 AbstractCegarLoop]: Abstraction has 7346 states and 9752 transitions. [2019-09-09 22:16:37,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:16:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 9752 transitions. [2019-09-09 22:16:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-09-09 22:16:37,903 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:16:37,904 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:16:37,904 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:16:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:16:37,904 INFO L82 PathProgramCache]: Analyzing trace with hash -966126917, now seen corresponding path program 1 times [2019-09-09 22:16:37,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:16:37,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:37,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:16:37,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:37,906 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:16:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:16:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-09 22:16:38,088 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:16:38,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 22:16:38,089 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:16:38,089 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 22:16:38,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 22:16:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 22:16:38,091 INFO L87 Difference]: Start difference. First operand 7346 states and 9752 transitions. Second operand 4 states. [2019-09-09 22:16:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:16:44,469 INFO L93 Difference]: Finished difference Result 20199 states and 26063 transitions. [2019-09-09 22:16:44,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 22:16:44,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 232 [2019-09-09 22:16:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:16:44,549 INFO L225 Difference]: With dead ends: 20199 [2019-09-09 22:16:44,549 INFO L226 Difference]: Without dead ends: 20199 [2019-09-09 22:16:44,550 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 22:16:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20199 states. [2019-09-09 22:16:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20199 to 19478. [2019-09-09 22:16:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19478 states. [2019-09-09 22:16:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19478 states to 19478 states and 25122 transitions. [2019-09-09 22:16:45,710 INFO L78 Accepts]: Start accepts. Automaton has 19478 states and 25122 transitions. Word has length 232 [2019-09-09 22:16:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:16:45,711 INFO L475 AbstractCegarLoop]: Abstraction has 19478 states and 25122 transitions. [2019-09-09 22:16:45,712 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 22:16:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 19478 states and 25122 transitions. [2019-09-09 22:16:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2019-09-09 22:16:45,733 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:16:45,734 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, 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, 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] [2019-09-09 22:16:45,734 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:16:45,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:16:45,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1767457122, now seen corresponding path program 1 times [2019-09-09 22:16:45,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:16:45,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:45,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:16:45,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:16:45,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:16:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:16:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 337 proven. 180 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-09 22:16:46,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:16:46,350 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:16:46,352 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 446 with the following transitions: [2019-09-09 22:16:46,355 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1951], [1959], [1967], [1975], [1983], [1987], [1989], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2328], [2329], [2333], [2337], [2341], [2345], [2349], [2353], [2356], [2357], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2388], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:16:46,443 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:16:46,443 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:16:55,812 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:16:55,814 INFO L272 AbstractInterpreter]: Visited 143 different actions 143 times. Never merged. Never widened. Performed 325 root evaluator evaluations with a maximum evaluation depth of 13. Performed 325 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:16:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:16:55,818 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:17:10,981 INFO L227 lantSequenceWeakener]: Weakened 421 states. On average, predicates are now at 77.76% of their original sizes. [2019-09-09 22:17:10,982 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:17:11,117 INFO L420 sIntCurrentIteration]: We unified 444 AI predicates to 444 [2019-09-09 22:17:11,118 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:17:11,118 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:17:11,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2019-09-09 22:17:11,119 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:17:11,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:17:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:17:11,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:17:11,122 INFO L87 Difference]: Start difference. First operand 19478 states and 25122 transitions. Second operand 10 states. [2019-09-09 22:19:45,482 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.