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/Problem19_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:48:40,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:48:40,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:48:40,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:48:40,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:48:40,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:48:40,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:48:40,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:48:40,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:48:40,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:48:40,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:48:40,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:48:40,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:48:40,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:48:40,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:48:40,481 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 23:48:40,496 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:48:40,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:48:40,496 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:48:40,497 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:48:40,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:48:40,498 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:48:40,498 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:48:40,498 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:48:40,498 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:48:40,498 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:48:40,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:48:40,499 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:48:40,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:48:40,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:48:40,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:48:40,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:48:40,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:48:40,501 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:48:40,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:48:40,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:48:40,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:48:40,501 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:48:40,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:48:40,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:48:40,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:48:40,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:48:40,503 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:48:40,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:48:40,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:48:40,503 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:48:40,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:48:40,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:48:40,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:48:40,550 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:48:40,551 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:48:40,552 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label59.c [2019-09-09 23:48:40,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93d0a9d2f/cbdc8c5d19544b9a8a2bcc01174b9370/FLAG69124e820 [2019-09-09 23:48:41,593 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:48:41,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label59.c [2019-09-09 23:48:41,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93d0a9d2f/cbdc8c5d19544b9a8a2bcc01174b9370/FLAG69124e820 [2019-09-09 23:48:41,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93d0a9d2f/cbdc8c5d19544b9a8a2bcc01174b9370 [2019-09-09 23:48:41,975 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:48:41,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:48:41,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:48:41,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:48:41,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:48:41,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:48:41" (1/1) ... [2019-09-09 23:48:41,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97b20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:41, skipping insertion in model container [2019-09-09 23:48:41,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:48:41" (1/1) ... [2019-09-09 23:48:41,997 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:48:42,284 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:48:44,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:48:44,459 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:48:45,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:48:45,593 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:48:45,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45 WrapperNode [2019-09-09 23:48:45,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:48:45,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:48:45,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:48:45,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:48:45,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45" (1/1) ... [2019-09-09 23:48:45,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45" (1/1) ... [2019-09-09 23:48:45,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45" (1/1) ... [2019-09-09 23:48:45,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45" (1/1) ... [2019-09-09 23:48:45,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45" (1/1) ... [2019-09-09 23:48:45,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45" (1/1) ... [2019-09-09 23:48:46,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45" (1/1) ... [2019-09-09 23:48:46,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:48:46,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:48:46,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:48:46,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:48:46,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45" (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 23:48:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:48:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:48:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:48:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:48:46,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:48:46,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:48:46,232 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:48:46,232 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:48:46,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:48:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:48:46,233 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:48:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:48:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:48:46,235 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:48:46,235 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:48:46,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:48:46,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:48:46,236 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:48:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:48:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:48:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:48:57,445 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:48:57,446 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:48:57,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:48:57 BoogieIcfgContainer [2019-09-09 23:48:57,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:48:57,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:48:57,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:48:57,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:48:57,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:48:41" (1/3) ... [2019-09-09 23:48:57,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1a21a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:48:57, skipping insertion in model container [2019-09-09 23:48:57,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:48:45" (2/3) ... [2019-09-09 23:48:57,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1a21a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:48:57, skipping insertion in model container [2019-09-09 23:48:57,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:48:57" (3/3) ... [2019-09-09 23:48:57,468 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label59.c [2019-09-09 23:48:57,480 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:48:57,492 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:48:57,510 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:48:57,541 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:48:57,542 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:48:57,542 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:48:57,542 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:48:57,542 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:48:57,542 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:48:57,542 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:48:57,542 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:48:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:48:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-09 23:48:57,617 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:48:57,618 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] [2019-09-09 23:48:57,620 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:48:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:48:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash 203787812, now seen corresponding path program 1 times [2019-09-09 23:48:57,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:48:57,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:48:57,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:48:57,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:48:57,688 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:48:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:48:58,014 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 23:48:58,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:48:58,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:48:58,017 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:48:58,023 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:48:58,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:48:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:48:58,042 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-09 23:49:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:49:11,021 INFO L93 Difference]: Finished difference Result 3275 states and 6045 transitions. [2019-09-09 23:49:11,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:49:11,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-09-09 23:49:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:49:11,070 INFO L225 Difference]: With dead ends: 3275 [2019-09-09 23:49:11,071 INFO L226 Difference]: Without dead ends: 3207 [2019-09-09 23:49:11,074 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 23:49:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2019-09-09 23:49:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 3156. [2019-09-09 23:49:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3156 states. [2019-09-09 23:49:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 5827 transitions. [2019-09-09 23:49:11,250 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 5827 transitions. Word has length 31 [2019-09-09 23:49:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:49:11,251 INFO L475 AbstractCegarLoop]: Abstraction has 3156 states and 5827 transitions. [2019-09-09 23:49:11,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:49:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 5827 transitions. [2019-09-09 23:49:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-09 23:49:11,256 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:49:11,257 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:49:11,257 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:49:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:49:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash -477797288, now seen corresponding path program 1 times [2019-09-09 23:49:11,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:49:11,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:49:11,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:49:11,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:49:11,260 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:49:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:49:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:49:11,468 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:49:11,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:49:11,468 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:49:11,470 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:49:11,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:49:11,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:49:11,471 INFO L87 Difference]: Start difference. First operand 3156 states and 5827 transitions. Second operand 6 states. [2019-09-09 23:49:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:49:29,381 INFO L93 Difference]: Finished difference Result 6130 states and 10982 transitions. [2019-09-09 23:49:29,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:49:29,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2019-09-09 23:49:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:49:29,431 INFO L225 Difference]: With dead ends: 6130 [2019-09-09 23:49:29,431 INFO L226 Difference]: Without dead ends: 6130 [2019-09-09 23:49:29,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:49:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6130 states. [2019-09-09 23:49:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6130 to 6069. [2019-09-09 23:49:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6069 states. [2019-09-09 23:49:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 10871 transitions. [2019-09-09 23:49:29,623 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 10871 transitions. Word has length 102 [2019-09-09 23:49:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:49:29,625 INFO L475 AbstractCegarLoop]: Abstraction has 6069 states and 10871 transitions. [2019-09-09 23:49:29,625 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:49:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 10871 transitions. [2019-09-09 23:49:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-09 23:49:29,628 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:49:29,628 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:49:29,629 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:49:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:49:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2089065162, now seen corresponding path program 1 times [2019-09-09 23:49:29,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:49:29,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:49:29,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:49:29,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:49:29,631 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:49:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:49:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:49:29,769 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:49:29,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:49:29,769 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:49:29,770 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:49:29,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:49:29,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:49:29,771 INFO L87 Difference]: Start difference. First operand 6069 states and 10871 transitions. Second operand 5 states. [2019-09-09 23:49:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:49:51,464 INFO L93 Difference]: Finished difference Result 12392 states and 19452 transitions. [2019-09-09 23:49:51,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 23:49:51,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2019-09-09 23:49:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:49:51,522 INFO L225 Difference]: With dead ends: 12392 [2019-09-09 23:49:51,522 INFO L226 Difference]: Without dead ends: 12392 [2019-09-09 23:49:51,523 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 23:49:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2019-09-09 23:49:51,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 12116. [2019-09-09 23:49:51,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12116 states. [2019-09-09 23:49:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12116 states to 12116 states and 18910 transitions. [2019-09-09 23:49:51,869 INFO L78 Accepts]: Start accepts. Automaton has 12116 states and 18910 transitions. Word has length 104 [2019-09-09 23:49:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:49:51,872 INFO L475 AbstractCegarLoop]: Abstraction has 12116 states and 18910 transitions. [2019-09-09 23:49:51,872 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:49:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12116 states and 18910 transitions. [2019-09-09 23:49:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-09 23:49:51,883 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:49:51,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:49:51,884 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:49:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:49:51,884 INFO L82 PathProgramCache]: Analyzing trace with hash -122796284, now seen corresponding path program 1 times [2019-09-09 23:49:51,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:49:51,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:49:51,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:49:51,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:49:51,886 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:49:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:49:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:49:52,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:49:52,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:49:52,052 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:49:52,053 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:49:52,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:49:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:49:52,054 INFO L87 Difference]: Start difference. First operand 12116 states and 18910 transitions. Second operand 6 states. [2019-09-09 23:50:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:50:08,692 INFO L93 Difference]: Finished difference Result 18348 states and 28001 transitions. [2019-09-09 23:50:08,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:50:08,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-09-09 23:50:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:50:08,773 INFO L225 Difference]: With dead ends: 18348 [2019-09-09 23:50:08,773 INFO L226 Difference]: Without dead ends: 18348 [2019-09-09 23:50:08,774 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:50:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18348 states. [2019-09-09 23:50:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18348 to 18194. [2019-09-09 23:50:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18194 states. [2019-09-09 23:50:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18194 states to 18194 states and 27323 transitions. [2019-09-09 23:50:09,165 INFO L78 Accepts]: Start accepts. Automaton has 18194 states and 27323 transitions. Word has length 109 [2019-09-09 23:50:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:50:09,166 INFO L475 AbstractCegarLoop]: Abstraction has 18194 states and 27323 transitions. [2019-09-09 23:50:09,166 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:50:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 18194 states and 27323 transitions. [2019-09-09 23:50:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-09 23:50:09,169 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:50:09,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:09,170 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:50:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:50:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1169044637, now seen corresponding path program 1 times [2019-09-09 23:50:09,170 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:50:09,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:50:09,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:50:09,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:50:09,172 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:50:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:50:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:50:09,294 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:50:09,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:50:09,294 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:50:09,295 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:50:09,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:50:09,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:50:09,296 INFO L87 Difference]: Start difference. First operand 18194 states and 27323 transitions. Second operand 5 states. [2019-09-09 23:50:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:50:28,631 INFO L93 Difference]: Finished difference Result 36382 states and 52901 transitions. [2019-09-09 23:50:28,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 23:50:28,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2019-09-09 23:50:28,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:50:28,773 INFO L225 Difference]: With dead ends: 36382 [2019-09-09 23:50:28,773 INFO L226 Difference]: Without dead ends: 36382 [2019-09-09 23:50:28,774 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 23:50:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36382 states. [2019-09-09 23:50:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36382 to 35220. [2019-09-09 23:50:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35220 states. [2019-09-09 23:50:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35220 states to 35220 states and 49778 transitions. [2019-09-09 23:50:29,922 INFO L78 Accepts]: Start accepts. Automaton has 35220 states and 49778 transitions. Word has length 159 [2019-09-09 23:50:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:50:29,924 INFO L475 AbstractCegarLoop]: Abstraction has 35220 states and 49778 transitions. [2019-09-09 23:50:29,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:50:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 35220 states and 49778 transitions. [2019-09-09 23:50:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-09-09 23:50:29,930 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:50:29,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:29,930 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:50:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:50:29,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1257537688, now seen corresponding path program 1 times [2019-09-09 23:50:29,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:50:29,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:50:29,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:50:29,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:50:29,934 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:50:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:50:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:50:30,136 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:50:30,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:50:30,136 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:50:30,138 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:50:30,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:50:30,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:50:30,138 INFO L87 Difference]: Start difference. First operand 35220 states and 49778 transitions. Second operand 6 states. [2019-09-09 23:50:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:50:47,944 INFO L93 Difference]: Finished difference Result 47942 states and 68025 transitions. [2019-09-09 23:50:47,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:50:47,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2019-09-09 23:50:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:50:48,112 INFO L225 Difference]: With dead ends: 47942 [2019-09-09 23:50:48,113 INFO L226 Difference]: Without dead ends: 47942 [2019-09-09 23:50:48,113 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:50:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47942 states. [2019-09-09 23:50:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47942 to 47548. [2019-09-09 23:50:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47548 states. [2019-09-09 23:50:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47548 states to 47548 states and 65659 transitions. [2019-09-09 23:50:49,133 INFO L78 Accepts]: Start accepts. Automaton has 47548 states and 65659 transitions. Word has length 169 [2019-09-09 23:50:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:50:49,133 INFO L475 AbstractCegarLoop]: Abstraction has 47548 states and 65659 transitions. [2019-09-09 23:50:49,133 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:50:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 47548 states and 65659 transitions. [2019-09-09 23:50:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-09 23:50:49,142 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:50:49,143 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 23:50:49,151 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:50:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:50:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1845334372, now seen corresponding path program 1 times [2019-09-09 23:50:49,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:50:49,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:50:49,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:50:49,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:50:49,154 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:50:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:50:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 23:50:49,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:50:49,295 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:50:49,296 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2019-09-09 23:50:49,298 INFO L207 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5382], [5384], [5387], [5395], [5403], [5411], [5419], [5427], [5435], [5443], [5451], [5459], [5467], [5475], [5483], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5746], [5749], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5845], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:50:49,374 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:50:49,374 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:50:57,498 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:50:57,500 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 234 root evaluator evaluations with a maximum evaluation depth of 14. Performed 234 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:50:57,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:50:57,505 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:51:02,423 INFO L227 lantSequenceWeakener]: Weakened 175 states. On average, predicates are now at 75.46% of their original sizes. [2019-09-09 23:51:02,423 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:51:02,539 INFO L420 sIntCurrentIteration]: We unified 193 AI predicates to 193 [2019-09-09 23:51:02,540 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:51:02,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:51:02,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 23:51:02,541 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:51:02,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 23:51:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 23:51:02,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:51:02,542 INFO L87 Difference]: Start difference. First operand 47548 states and 65659 transitions. Second operand 10 states. [2019-09-09 23:55:12,480 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.