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/Problem11_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:14:18,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:14:18,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:14:18,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 15:14:18,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 15:14:18,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 15:14:18,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 15:14:18,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 15:14:18,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 15:14:18,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 15:14:18,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 15:14:18,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 15:14:18,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 15:14:18,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 15:14:18,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 15:14:18,132 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 15:14:18,148 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:14:18,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:14:18,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:14:18,149 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:14:18,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:14:18,150 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:14:18,150 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:14:18,150 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:14:18,150 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:14:18,150 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:14:18,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:14:18,151 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:14:18,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:14:18,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:14:18,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:14:18,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:14:18,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:14:18,152 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:14:18,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:14:18,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:14:18,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:14:18,153 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:14:18,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:14:18,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:14:18,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:14:18,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:14:18,154 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:14:18,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:14:18,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:14:18,155 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:14:18,199 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:14:18,211 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:14:18,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:14:18,216 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:14:18,216 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:14:18,217 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label23.c [2019-09-09 15:14:18,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314454e3c/553c1184efdc4d2d99fb9af3807b4b48/FLAG8ce15169b [2019-09-09 15:14:18,934 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:14:18,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label23.c [2019-09-09 15:14:18,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314454e3c/553c1184efdc4d2d99fb9af3807b4b48/FLAG8ce15169b [2019-09-09 15:14:19,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314454e3c/553c1184efdc4d2d99fb9af3807b4b48 [2019-09-09 15:14:19,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:14:19,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:14:19,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:14:19,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:14:19,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:14:19,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:14:19" (1/1) ... [2019-09-09 15:14:19,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d514558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:19, skipping insertion in model container [2019-09-09 15:14:19,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:14:19" (1/1) ... [2019-09-09 15:14:19,186 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:14:19,247 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:14:19,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:14:19,930 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:14:20,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:14:20,206 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:14:20,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20 WrapperNode [2019-09-09 15:14:20,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:14:20,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:14:20,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:14:20,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:14:20,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20" (1/1) ... [2019-09-09 15:14:20,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20" (1/1) ... [2019-09-09 15:14:20,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20" (1/1) ... [2019-09-09 15:14:20,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20" (1/1) ... [2019-09-09 15:14:20,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20" (1/1) ... [2019-09-09 15:14:20,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20" (1/1) ... [2019-09-09 15:14:20,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20" (1/1) ... [2019-09-09 15:14:20,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:14:20,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:14:20,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:14:20,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:14:20,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20" (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 15:14:20,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:14:20,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:14:20,482 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:14:20,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:14:20,482 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:14:20,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:14:20,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:14:20,483 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:14:20,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:14:20,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:14:20,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:14:22,268 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:14:22,269 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:14:22,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:14:22 BoogieIcfgContainer [2019-09-09 15:14:22,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:14:22,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:14:22,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:14:22,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:14:22,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:14:19" (1/3) ... [2019-09-09 15:14:22,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d51a0c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:14:22, skipping insertion in model container [2019-09-09 15:14:22,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:14:20" (2/3) ... [2019-09-09 15:14:22,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d51a0c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:14:22, skipping insertion in model container [2019-09-09 15:14:22,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:14:22" (3/3) ... [2019-09-09 15:14:22,281 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label23.c [2019-09-09 15:14:22,292 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:14:22,302 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:14:22,321 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:14:22,354 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:14:22,354 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:14:22,355 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:14:22,355 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:14:22,355 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:14:22,355 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:14:22,355 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:14:22,356 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:14:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-09-09 15:14:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-09 15:14:22,400 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:14:22,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:14:22,404 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:14:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:14:22,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1552063366, now seen corresponding path program 1 times [2019-09-09 15:14:22,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:14:22,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:14:22,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:14:22,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:14:22,503 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:14:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:14:22,892 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 15:14:22,894 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:14:22,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 15:14:22,895 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:14:22,901 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 15:14:22,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 15:14:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 15:14:22,922 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-09-09 15:14:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:14:24,368 INFO L93 Difference]: Finished difference Result 493 states and 793 transitions. [2019-09-09 15:14:24,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 15:14:24,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-09-09 15:14:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:14:24,388 INFO L225 Difference]: With dead ends: 493 [2019-09-09 15:14:24,388 INFO L226 Difference]: Without dead ends: 425 [2019-09-09 15:14:24,390 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 15:14:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-09-09 15:14:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-09-09 15:14:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-09-09 15:14:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-09-09 15:14:24,497 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 71 [2019-09-09 15:14:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:14:24,498 INFO L475 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-09-09 15:14:24,498 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 15:14:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-09-09 15:14:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 15:14:24,512 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:14:24,512 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, 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] [2019-09-09 15:14:24,513 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:14:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:14:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1937579030, now seen corresponding path program 1 times [2019-09-09 15:14:24,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:14:24,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:14:24,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:14:24,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:14:24,518 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:14:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:14:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:14:24,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:14:24,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:14:24,716 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:14:24,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:14:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:14:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:14:24,719 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-09-09 15:14:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:14:27,562 INFO L93 Difference]: Finished difference Result 1251 states and 1866 transitions. [2019-09-09 15:14:27,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 15:14:27,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-09-09 15:14:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:14:27,576 INFO L225 Difference]: With dead ends: 1251 [2019-09-09 15:14:27,576 INFO L226 Difference]: Without dead ends: 1251 [2019-09-09 15:14:27,577 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 15:14:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-09-09 15:14:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-09-09 15:14:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-09-09 15:14:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1739 transitions. [2019-09-09 15:14:27,663 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1739 transitions. Word has length 141 [2019-09-09 15:14:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:14:27,664 INFO L475 AbstractCegarLoop]: Abstraction has 1217 states and 1739 transitions. [2019-09-09 15:14:27,664 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:14:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1739 transitions. [2019-09-09 15:14:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-09 15:14:27,668 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:14:27,669 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, 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] [2019-09-09 15:14:27,669 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:14:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:14:27,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1983928202, now seen corresponding path program 1 times [2019-09-09 15:14:27,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:14:27,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:14:27,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:14:27,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:14:27,671 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:14:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:14:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:14:27,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:14:27,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:14:27,863 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:14:27,865 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:14:27,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:14:27,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:14:27,866 INFO L87 Difference]: Start difference. First operand 1217 states and 1739 transitions. Second operand 6 states. [2019-09-09 15:14:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:14:29,488 INFO L93 Difference]: Finished difference Result 2239 states and 3085 transitions. [2019-09-09 15:14:29,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 15:14:29,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2019-09-09 15:14:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:14:29,509 INFO L225 Difference]: With dead ends: 2239 [2019-09-09 15:14:29,510 INFO L226 Difference]: Without dead ends: 2239 [2019-09-09 15:14:29,510 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 15:14:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2019-09-09 15:14:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2212. [2019-09-09 15:14:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-09-09 15:14:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3012 transitions. [2019-09-09 15:14:29,621 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3012 transitions. Word has length 151 [2019-09-09 15:14:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:14:29,632 INFO L475 AbstractCegarLoop]: Abstraction has 2212 states and 3012 transitions. [2019-09-09 15:14:29,632 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:14:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3012 transitions. [2019-09-09 15:14:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-09-09 15:14:29,642 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:14:29,643 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:14:29,643 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:14:29,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:14:29,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1698562555, now seen corresponding path program 1 times [2019-09-09 15:14:29,644 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:14:29,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:14:29,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:14:29,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:14:29,645 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:14:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:14:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:14:29,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:14:29,894 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:14:29,895 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 215 with the following transitions: [2019-09-09 15:14:29,898 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [477], [479], [482], [490], [495], [498], [499], [503], [507], [510], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-09-09 15:14:29,953 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:14:29,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:14:56,690 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:14:56,692 INFO L272 AbstractInterpreter]: Visited 78 different actions 78 times. Never merged. Never widened. Performed 205 root evaluator evaluations with a maximum evaluation depth of 16. Performed 205 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-09-09 15:14:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:14:56,697 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:15:44,153 INFO L227 lantSequenceWeakener]: Weakened 195 states. On average, predicates are now at 74.24% of their original sizes. [2019-09-09 15:15:44,154 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:15:44,241 INFO L420 sIntCurrentIteration]: We unified 213 AI predicates to 213 [2019-09-09 15:15:44,242 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:15:44,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:15:44,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 15:15:44,243 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:15:44,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 15:15:44,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 15:15:44,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 15:15:44,245 INFO L87 Difference]: Start difference. First operand 2212 states and 3012 transitions. Second operand 10 states.