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/Problem13_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:46:54,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:46:54,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:46:54,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:46:54,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:46:54,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:46:54,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:46:54,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:46:54,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:46:54,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:46:54,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:46:54,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:46:54,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:46:54,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:46:54,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:46:54,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:46:54,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:46:54,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:46:54,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:46:54,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:46:54,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:46:54,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:46:54,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:46:54,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:46:54,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:46:54,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:46:54,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:46:54,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:46:54,278 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 17:46:54,298 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:46:54,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:46:54,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:46:54,299 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:46:54,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:46:54,300 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:46:54,300 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:46:54,300 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:46:54,301 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:46:54,301 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:46:54,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:46:54,303 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:46:54,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:46:54,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:46:54,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:46:54,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:46:54,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:46:54,304 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:46:54,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:46:54,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:46:54,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:46:54,305 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:46:54,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:46:54,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:46:54,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:46:54,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:46:54,306 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:46:54,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:46:54,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:46:54,307 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:46:54,335 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:46:54,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:46:54,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:46:54,356 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:46:54,356 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:46:54,357 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label53.c [2019-09-09 17:46:54,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a31d1821/0d7191ee93974147b7d29af7f968d0b8/FLAG38d2575a4 [2019-09-09 17:46:55,293 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:46:55,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label53.c [2019-09-09 17:46:55,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a31d1821/0d7191ee93974147b7d29af7f968d0b8/FLAG38d2575a4 [2019-09-09 17:46:55,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a31d1821/0d7191ee93974147b7d29af7f968d0b8 [2019-09-09 17:46:55,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:46:55,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:46:55,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:46:55,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:46:55,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:46:55,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:46:55" (1/1) ... [2019-09-09 17:46:55,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779b0c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:55, skipping insertion in model container [2019-09-09 17:46:55,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:46:55" (1/1) ... [2019-09-09 17:46:55,753 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:46:55,933 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:46:57,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:46:57,601 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:46:58,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:46:58,426 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:46:58,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58 WrapperNode [2019-09-09 17:46:58,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:46:58,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:46:58,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:46:58,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:46:58,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58" (1/1) ... [2019-09-09 17:46:58,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58" (1/1) ... [2019-09-09 17:46:58,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58" (1/1) ... [2019-09-09 17:46:58,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58" (1/1) ... [2019-09-09 17:46:58,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58" (1/1) ... [2019-09-09 17:46:58,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58" (1/1) ... [2019-09-09 17:46:58,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58" (1/1) ... [2019-09-09 17:46:58,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:46:58,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:46:58,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:46:58,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:46:58,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58" (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 17:46:58,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:46:58,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:46:58,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:46:58,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:46:58,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:46:58,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:46:58,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:46:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:46:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:46:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:46:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:46:58,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:46:58,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:46:58,862 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:46:58,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:46:58,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:46:58,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:47:05,834 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:47:05,834 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:47:05,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:47:05 BoogieIcfgContainer [2019-09-09 17:47:05,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:47:05,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:47:05,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:47:05,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:47:05,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:46:55" (1/3) ... [2019-09-09 17:47:05,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a073fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:47:05, skipping insertion in model container [2019-09-09 17:47:05,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:46:58" (2/3) ... [2019-09-09 17:47:05,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a073fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:47:05, skipping insertion in model container [2019-09-09 17:47:05,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:47:05" (3/3) ... [2019-09-09 17:47:05,845 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label53.c [2019-09-09 17:47:05,856 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:47:05,865 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:47:05,884 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:47:05,913 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:47:05,914 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:47:05,914 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:47:05,914 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:47:05,914 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:47:05,914 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:47:05,915 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:47:05,915 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:47:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:47:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-09 17:47:05,965 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:47:05,966 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] [2019-09-09 17:47:05,968 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:47:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:47:05,975 INFO L82 PathProgramCache]: Analyzing trace with hash -592016848, now seen corresponding path program 1 times [2019-09-09 17:47:05,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:47:06,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:06,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:47:06,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:06,036 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:47:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:47:06,361 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 17:47:06,364 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:47:06,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:47:06,364 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:47:06,369 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:47:06,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:47:06,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:47:06,388 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:47:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:47:13,319 INFO L93 Difference]: Finished difference Result 1977 states and 3509 transitions. [2019-09-09 17:47:13,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:47:13,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-09-09 17:47:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:47:13,359 INFO L225 Difference]: With dead ends: 1977 [2019-09-09 17:47:13,360 INFO L226 Difference]: Without dead ends: 1909 [2019-09-09 17:47:13,361 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 17:47:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2019-09-09 17:47:13,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1895. [2019-09-09 17:47:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1895 states. [2019-09-09 17:47:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 3364 transitions. [2019-09-09 17:47:13,515 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 3364 transitions. Word has length 37 [2019-09-09 17:47:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:47:13,516 INFO L475 AbstractCegarLoop]: Abstraction has 1895 states and 3364 transitions. [2019-09-09 17:47:13,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:47:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 3364 transitions. [2019-09-09 17:47:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-09 17:47:13,523 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:47:13,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:13,523 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:47:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:47:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash -32383083, now seen corresponding path program 1 times [2019-09-09 17:47:13,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:47:13,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:13,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:47:13,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:13,526 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:47:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:47:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:47:13,729 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:47:13,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:47:13,729 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:47:13,731 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:47:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:47:13,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:47:13,732 INFO L87 Difference]: Start difference. First operand 1895 states and 3364 transitions. Second operand 6 states. [2019-09-09 17:47:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:47:22,135 INFO L93 Difference]: Finished difference Result 3610 states and 5770 transitions. [2019-09-09 17:47:22,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:47:22,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-09-09 17:47:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:47:22,175 INFO L225 Difference]: With dead ends: 3610 [2019-09-09 17:47:22,176 INFO L226 Difference]: Without dead ends: 3610 [2019-09-09 17:47:22,177 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 17:47:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2019-09-09 17:47:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3579. [2019-09-09 17:47:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3579 states. [2019-09-09 17:47:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 5705 transitions. [2019-09-09 17:47:22,290 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 5705 transitions. Word has length 119 [2019-09-09 17:47:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:47:22,291 INFO L475 AbstractCegarLoop]: Abstraction has 3579 states and 5705 transitions. [2019-09-09 17:47:22,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:47:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 5705 transitions. [2019-09-09 17:47:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-09 17:47:22,295 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:47:22,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:22,295 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:47:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:47:22,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1518489925, now seen corresponding path program 1 times [2019-09-09 17:47:22,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:47:22,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:22,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:47:22,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:22,298 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:47:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:47:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:47:22,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:47:22,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:47:22,467 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:47:22,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:47:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:47:22,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:47:22,468 INFO L87 Difference]: Start difference. First operand 3579 states and 5705 transitions. Second operand 5 states. [2019-09-09 17:47:32,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:47:32,463 INFO L93 Difference]: Finished difference Result 7229 states and 10804 transitions. [2019-09-09 17:47:32,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:47:32,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2019-09-09 17:47:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:47:32,513 INFO L225 Difference]: With dead ends: 7229 [2019-09-09 17:47:32,513 INFO L226 Difference]: Without dead ends: 7229 [2019-09-09 17:47:32,523 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 17:47:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7229 states. [2019-09-09 17:47:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7229 to 7042. [2019-09-09 17:47:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7042 states. [2019-09-09 17:47:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7042 states to 7042 states and 10398 transitions. [2019-09-09 17:47:32,750 INFO L78 Accepts]: Start accepts. Automaton has 7042 states and 10398 transitions. Word has length 135 [2019-09-09 17:47:32,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:47:32,753 INFO L475 AbstractCegarLoop]: Abstraction has 7042 states and 10398 transitions. [2019-09-09 17:47:32,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:47:32,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7042 states and 10398 transitions. [2019-09-09 17:47:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-09 17:47:32,761 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:47:32,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:32,762 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:47:32,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:47:32,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1655732315, now seen corresponding path program 1 times [2019-09-09 17:47:32,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:47:32,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:32,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:47:32,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:32,764 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:47:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:47:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:47:33,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:47:33,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:47:33,055 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:47:33,056 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:47:33,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:47:33,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:47:33,057 INFO L87 Difference]: Start difference. First operand 7042 states and 10398 transitions. Second operand 6 states. [2019-09-09 17:47:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:47:40,727 INFO L93 Difference]: Finished difference Result 10918 states and 16309 transitions. [2019-09-09 17:47:40,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:47:40,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-09-09 17:47:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:47:40,781 INFO L225 Difference]: With dead ends: 10918 [2019-09-09 17:47:40,781 INFO L226 Difference]: Without dead ends: 10918 [2019-09-09 17:47:40,782 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 17:47:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10918 states. [2019-09-09 17:47:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10918 to 10727. [2019-09-09 17:47:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10727 states. [2019-09-09 17:47:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10727 states to 10727 states and 15561 transitions. [2019-09-09 17:47:41,062 INFO L78 Accepts]: Start accepts. Automaton has 10727 states and 15561 transitions. Word has length 172 [2019-09-09 17:47:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:47:41,064 INFO L475 AbstractCegarLoop]: Abstraction has 10727 states and 15561 transitions. [2019-09-09 17:47:41,064 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:47:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10727 states and 15561 transitions. [2019-09-09 17:47:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-09 17:47:41,068 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:47:41,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:41,068 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:47:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:47:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1148283996, now seen corresponding path program 1 times [2019-09-09 17:47:41,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:47:41,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:41,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:47:41,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:41,070 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:47:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:47:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:47:41,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:47:41,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:47:41,340 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:47:41,341 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:47:41,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:47:41,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:47:41,341 INFO L87 Difference]: Start difference. First operand 10727 states and 15561 transitions. Second operand 6 states. [2019-09-09 17:47:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:47:53,750 INFO L93 Difference]: Finished difference Result 26288 states and 40917 transitions. [2019-09-09 17:47:53,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 17:47:53,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 194 [2019-09-09 17:47:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:47:53,868 INFO L225 Difference]: With dead ends: 26288 [2019-09-09 17:47:53,868 INFO L226 Difference]: Without dead ends: 26288 [2019-09-09 17:47:53,869 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 17:47:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26288 states. [2019-09-09 17:47:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26288 to 26083. [2019-09-09 17:47:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26083 states. [2019-09-09 17:47:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26083 states to 26083 states and 38089 transitions. [2019-09-09 17:47:54,680 INFO L78 Accepts]: Start accepts. Automaton has 26083 states and 38089 transitions. Word has length 194 [2019-09-09 17:47:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:47:54,680 INFO L475 AbstractCegarLoop]: Abstraction has 26083 states and 38089 transitions. [2019-09-09 17:47:54,681 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:47:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 26083 states and 38089 transitions. [2019-09-09 17:47:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-09-09 17:47:54,686 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:47:54,686 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:54,686 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:47:54,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:47:54,687 INFO L82 PathProgramCache]: Analyzing trace with hash 410705274, now seen corresponding path program 1 times [2019-09-09 17:47:54,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:47:54,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:54,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:47:54,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:54,691 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:47:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:47:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:47:54,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:47:54,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:47:54,997 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:47:54,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:47:54,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:47:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:47:54,998 INFO L87 Difference]: Start difference. First operand 26083 states and 38089 transitions. Second operand 6 states. [2019-09-09 17:47:55,182 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2019-09-09 17:48:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:48:02,815 INFO L93 Difference]: Finished difference Result 35202 states and 53902 transitions. [2019-09-09 17:48:02,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:48:02,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 217 [2019-09-09 17:48:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:48:02,951 INFO L225 Difference]: With dead ends: 35202 [2019-09-09 17:48:02,951 INFO L226 Difference]: Without dead ends: 35202 [2019-09-09 17:48:02,952 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 17:48:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35202 states. [2019-09-09 17:48:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35202 to 34937. [2019-09-09 17:48:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34937 states. [2019-09-09 17:48:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34937 states to 34937 states and 50675 transitions. [2019-09-09 17:48:03,822 INFO L78 Accepts]: Start accepts. Automaton has 34937 states and 50675 transitions. Word has length 217 [2019-09-09 17:48:03,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:48:03,822 INFO L475 AbstractCegarLoop]: Abstraction has 34937 states and 50675 transitions. [2019-09-09 17:48:03,823 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:48:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 34937 states and 50675 transitions. [2019-09-09 17:48:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-09-09 17:48:03,831 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:48:03,833 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:48:03,836 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:48:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:48:03,837 INFO L82 PathProgramCache]: Analyzing trace with hash 692874918, now seen corresponding path program 1 times [2019-09-09 17:48:03,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:48:03,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:48:03,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:48:03,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:48:03,839 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:48:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:48:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 60 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:48:03,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:48:03,997 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:48:03,999 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 241 with the following transitions: [2019-09-09 17:48:04,001 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2831], [2833], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3257], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3285], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:48:04,070 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:48:04,070 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:49:01,186 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:49:01,188 INFO L272 AbstractInterpreter]: Visited 110 different actions 110 times. Never merged. Never widened. Performed 151 root evaluator evaluations with a maximum evaluation depth of 17. Performed 151 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:49:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:49:01,192 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:50:21,000 INFO L227 lantSequenceWeakener]: Weakened 231 states. On average, predicates are now at 71% of their original sizes. [2019-09-09 17:50:21,000 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:50:21,073 INFO L420 sIntCurrentIteration]: We unified 239 AI predicates to 239 [2019-09-09 17:50:21,074 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:50:21,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:50:21,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2019-09-09 17:50:21,075 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:50:21,076 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:50:21,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:50:21,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:50:21,077 INFO L87 Difference]: Start difference. First operand 34937 states and 50675 transitions. Second operand 8 states. [2019-09-09 17:53:59,709 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.