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/Problem12_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:30:16,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:30:16,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:30:16,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 16:30:16,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 16:30:16,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 16:30:16,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 16:30:16,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 16:30:16,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 16:30:16,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 16:30:16,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 16:30:16,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 16:30:16,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 16:30:16,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 16:30:16,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 16:30:16,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 16:30:16,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 16:30:16,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:30:16,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:30:16,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:30:16,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:30:16,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:30:16,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:30:16,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:30:16,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:30:16,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:30:16,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:30:16,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:30:16,221 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 16:30:16,236 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:30:16,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:30:16,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:30:16,237 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:30:16,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:30:16,237 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:30:16,238 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:30:16,238 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:30:16,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:30:16,238 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:30:16,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:30:16,239 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:30:16,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:30:16,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:30:16,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:30:16,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:30:16,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:30:16,240 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:30:16,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:30:16,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:30:16,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:30:16,241 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:30:16,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:30:16,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:30:16,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:30:16,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:30:16,242 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:30:16,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:30:16,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:30:16,243 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:30:16,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:30:16,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:30:16,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:30:16,294 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:30:16,294 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:30:16,295 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-09-09 16:30:16,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44069ec33/d23eaf2b50494e129aa14558202a0d7a/FLAG16df20c49 [2019-09-09 16:30:17,109 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:30:17,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-09-09 16:30:17,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44069ec33/d23eaf2b50494e129aa14558202a0d7a/FLAG16df20c49 [2019-09-09 16:30:17,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44069ec33/d23eaf2b50494e129aa14558202a0d7a [2019-09-09 16:30:17,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:30:17,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:30:17,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:30:17,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:30:17,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:30:17,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:30:17" (1/1) ... [2019-09-09 16:30:17,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe21a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:17, skipping insertion in model container [2019-09-09 16:30:17,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:30:17" (1/1) ... [2019-09-09 16:30:17,680 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:30:17,852 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:30:19,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:30:19,408 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:30:20,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:30:20,069 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:30:20,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20 WrapperNode [2019-09-09 16:30:20,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:30:20,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:30:20,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:30:20,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:30:20,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20" (1/1) ... [2019-09-09 16:30:20,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20" (1/1) ... [2019-09-09 16:30:20,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20" (1/1) ... [2019-09-09 16:30:20,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20" (1/1) ... [2019-09-09 16:30:20,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20" (1/1) ... [2019-09-09 16:30:20,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20" (1/1) ... [2019-09-09 16:30:20,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20" (1/1) ... [2019-09-09 16:30:20,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:30:20,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:30:20,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:30:20,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:30:20,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20" (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 16:30:20,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:30:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:30:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:30:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:30:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:30:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:30:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:30:20,485 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:30:20,485 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:30:20,485 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:30:20,486 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:30:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:30:20,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:30:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:30:20,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:30:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:30:20,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:30:25,471 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:30:25,471 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:30:25,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:30:25 BoogieIcfgContainer [2019-09-09 16:30:25,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:30:25,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:30:25,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:30:25,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:30:25,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:30:17" (1/3) ... [2019-09-09 16:30:25,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68204a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:30:25, skipping insertion in model container [2019-09-09 16:30:25,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:30:20" (2/3) ... [2019-09-09 16:30:25,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68204a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:30:25, skipping insertion in model container [2019-09-09 16:30:25,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:30:25" (3/3) ... [2019-09-09 16:30:25,483 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label36.c [2019-09-09 16:30:25,493 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:30:25,502 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:30:25,520 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:30:25,548 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:30:25,548 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:30:25,548 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:30:25,549 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:30:25,549 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:30:25,549 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:30:25,549 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:30:25,549 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:30:25,584 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 16:30:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-09 16:30:25,597 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:30:25,598 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] [2019-09-09 16:30:25,600 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:30:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:30:25,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1144100014, now seen corresponding path program 1 times [2019-09-09 16:30:25,608 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:30:25,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:30:25,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:30:25,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:30:25,662 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:30:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:30:26,011 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 16:30:26,014 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:30:26,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 16:30:26,015 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:30:26,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 16:30:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 16:30:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 16:30:26,040 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-09-09 16:30:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:30:31,254 INFO L93 Difference]: Finished difference Result 1610 states and 2807 transitions. [2019-09-09 16:30:31,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 16:30:31,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-09-09 16:30:31,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:30:31,308 INFO L225 Difference]: With dead ends: 1610 [2019-09-09 16:30:31,308 INFO L226 Difference]: Without dead ends: 1542 [2019-09-09 16:30:31,311 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 16:30:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-09-09 16:30:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-09-09 16:30:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-09-09 16:30:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2702 transitions. [2019-09-09 16:30:31,479 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2702 transitions. Word has length 63 [2019-09-09 16:30:31,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:30:31,481 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2702 transitions. [2019-09-09 16:30:31,481 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 16:30:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2702 transitions. [2019-09-09 16:30:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-09 16:30:31,495 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:30:31,496 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, 1, 1, 1, 1, 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 16:30:31,497 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:30:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:30:31,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1744493685, now seen corresponding path program 1 times [2019-09-09 16:30:31,498 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:30:31,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:30:31,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:30:31,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:30:31,501 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:30:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:30:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:30:31,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:30:31,910 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:30:31,911 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 139 with the following transitions: [2019-09-09 16:30:31,914 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2235], [2243], [2251], [2259], [2267], [2275], [2279], [2281], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2384], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 16:30:31,975 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:30:31,976 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 16:30:44,352 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 16:30:44,355 INFO L272 AbstractInterpreter]: Visited 82 different actions 159 times. Merged at 4 different actions 5 times. Never widened. Performed 383 root evaluator evaluations with a maximum evaluation depth of 16. Performed 383 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 16:30:44,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:30:44,360 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 16:30:49,173 INFO L227 lantSequenceWeakener]: Weakened 135 states. On average, predicates are now at 76.24% of their original sizes. [2019-09-09 16:30:49,174 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 16:30:49,253 INFO L420 sIntCurrentIteration]: We unified 137 AI predicates to 137 [2019-09-09 16:30:49,253 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 16:30:49,254 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 16:30:49,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 16:30:49,255 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:30:49,256 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 16:30:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 16:30:49,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 16:30:49,257 INFO L87 Difference]: Start difference. First operand 1542 states and 2702 transitions. Second operand 11 states. [2019-09-09 16:31:49,276 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.