java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:51:38,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:51:38,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:51:38,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:51:38,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 21:51:38,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 21:51:38,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 21:51:38,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 21:51:38,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 21:51:38,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 21:51:38,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 21:51:38,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 21:51:38,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 21:51:38,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 21:51:38,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 21:51:38,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 21:51:38,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 21:51:38,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 21:51:38,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 21:51:38,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 21:51:38,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 21:51:38,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 21:51:38,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 21:51:38,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 21:51:38,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 21:51:38,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:51:38,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:51:38,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:51:38,279 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 21:51:38,293 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:51:38,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:51:38,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:51:38,294 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:51:38,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:51:38,295 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:51:38,295 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:51:38,295 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:51:38,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:51:38,296 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:51:38,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:51:38,296 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:51:38,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:51:38,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:51:38,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:51:38,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:51:38,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:51:38,297 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:51:38,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:51:38,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:51:38,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:51:38,298 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:51:38,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:51:38,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:51:38,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:51:38,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:51:38,299 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:51:38,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:51:38,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:51:38,300 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:51:38,327 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:51:38,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:51:38,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:51:38,345 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:51:38,345 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:51:38,346 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label02.c [2019-09-09 21:51:38,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01e29632/26d30b5e43c1496c8b23e1e410f51d24/FLAG02f0bc894 [2019-09-09 21:51:39,143 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:51:39,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label02.c [2019-09-09 21:51:39,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01e29632/26d30b5e43c1496c8b23e1e410f51d24/FLAG02f0bc894 [2019-09-09 21:51:39,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01e29632/26d30b5e43c1496c8b23e1e410f51d24 [2019-09-09 21:51:39,253 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:51:39,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:51:39,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:51:39,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:51:39,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:51:39,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:51:39" (1/1) ... [2019-09-09 21:51:39,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772df1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:39, skipping insertion in model container [2019-09-09 21:51:39,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:51:39" (1/1) ... [2019-09-09 21:51:39,273 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:51:39,401 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:51:40,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:51:40,737 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:51:41,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:51:41,205 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:51:41,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41 WrapperNode [2019-09-09 21:51:41,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:51:41,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:51:41,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:51:41,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:51:41,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41" (1/1) ... [2019-09-09 21:51:41,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41" (1/1) ... [2019-09-09 21:51:41,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41" (1/1) ... [2019-09-09 21:51:41,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41" (1/1) ... [2019-09-09 21:51:41,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41" (1/1) ... [2019-09-09 21:51:41,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41" (1/1) ... [2019-09-09 21:51:41,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41" (1/1) ... [2019-09-09 21:51:41,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:51:41,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:51:41,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:51:41,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:51:41,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41" (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 21:51:41,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:51:41,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:51:41,610 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:51:41,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:51:41,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 21:51:41,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:51:41,611 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:51:41,611 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:51:41,611 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 21:51:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:51:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:51:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:51:41,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:51:41,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:51:41,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:51:45,374 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:51:45,375 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:51:45,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:51:45 BoogieIcfgContainer [2019-09-09 21:51:45,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:51:45,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:51:45,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:51:45,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:51:45,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:51:39" (1/3) ... [2019-09-09 21:51:45,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fe2890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:51:45, skipping insertion in model container [2019-09-09 21:51:45,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:41" (2/3) ... [2019-09-09 21:51:45,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fe2890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:51:45, skipping insertion in model container [2019-09-09 21:51:45,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:51:45" (3/3) ... [2019-09-09 21:51:45,395 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label02.c [2019-09-09 21:51:45,409 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:51:45,425 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:51:45,446 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:51:45,479 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:51:45,480 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:51:45,480 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:51:45,480 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:51:45,480 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:51:45,480 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:51:45,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:51:45,481 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:51:45,530 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 21:51:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-09 21:51:45,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:51:45,549 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] [2019-09-09 21:51:45,551 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:51:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:51:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash 719675626, now seen corresponding path program 1 times [2019-09-09 21:51:45,561 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:51:45,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:45,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:51:45,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:45,615 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:51:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:51:46,017 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 21:51:46,020 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:51:46,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 21:51:46,021 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:51:46,026 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 21:51:46,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 21:51:46,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 21:51:46,044 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 21:51:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:51:50,595 INFO L93 Difference]: Finished difference Result 1480 states and 2747 transitions. [2019-09-09 21:51:50,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 21:51:50,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2019-09-09 21:51:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:51:50,634 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 21:51:50,634 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 21:51:50,636 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 21:51:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 21:51:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 21:51:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 21:51:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-09-09 21:51:50,780 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 67 [2019-09-09 21:51:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:51:50,781 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-09-09 21:51:50,781 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 21:51:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-09-09 21:51:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 21:51:50,788 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:51:50,788 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, 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 21:51:50,788 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:51:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:51:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash 665452822, now seen corresponding path program 1 times [2019-09-09 21:51:50,789 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:51:50,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:50,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:51:50,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:50,791 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:51:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:51:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:51:51,021 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:51:51,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:51:51,021 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:51:51,023 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:51:51,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:51:51,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:51:51,024 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-09-09 21:51:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:51:56,414 INFO L93 Difference]: Finished difference Result 2888 states and 4815 transitions. [2019-09-09 21:51:56,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:51:56,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-09-09 21:51:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:51:56,445 INFO L225 Difference]: With dead ends: 2888 [2019-09-09 21:51:56,446 INFO L226 Difference]: Without dead ends: 2888 [2019-09-09 21:51:56,447 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 21:51:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-09-09 21:51:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-09-09 21:51:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-09-09 21:51:56,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-09-09 21:51:56,577 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 141 [2019-09-09 21:51:56,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:51:56,581 INFO L475 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-09-09 21:51:56,581 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:51:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-09-09 21:51:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-09-09 21:51:56,594 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:51:56,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:56,596 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:51:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:51:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1806668562, now seen corresponding path program 1 times [2019-09-09 21:51:56,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:51:56,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:56,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:51:56,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:56,601 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:51:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:51:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:51:56,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:51:56,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:51:56,884 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:51:56,886 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:51:56,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:51:56,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:51:56,887 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-09-09 21:52:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:52:05,895 INFO L93 Difference]: Finished difference Result 8860 states and 13553 transitions. [2019-09-09 21:52:05,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 21:52:05,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-09-09 21:52:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:52:05,957 INFO L225 Difference]: With dead ends: 8860 [2019-09-09 21:52:05,958 INFO L226 Difference]: Without dead ends: 8860 [2019-09-09 21:52:05,958 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 21:52:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8860 states. [2019-09-09 21:52:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8860 to 8802. [2019-09-09 21:52:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8802 states. [2019-09-09 21:52:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8802 states to 8802 states and 13066 transitions. [2019-09-09 21:52:06,310 INFO L78 Accepts]: Start accepts. Automaton has 8802 states and 13066 transitions. Word has length 153 [2019-09-09 21:52:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:52:06,312 INFO L475 AbstractCegarLoop]: Abstraction has 8802 states and 13066 transitions. [2019-09-09 21:52:06,312 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:52:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 8802 states and 13066 transitions. [2019-09-09 21:52:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-09-09 21:52:06,316 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:52:06,317 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 21:52:06,317 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:52:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:52:06,318 INFO L82 PathProgramCache]: Analyzing trace with hash -819427725, now seen corresponding path program 1 times [2019-09-09 21:52:06,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:52:06,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:52:06,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:52:06,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:52:06,320 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:52:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:52:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 120 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 21:52:06,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:52:06,507 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:52:06,508 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2019-09-09 21:52:06,510 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1951], [1959], [1967], [1975], [1983], [1991], [1999], [2007], [2015], [2023], [2031], [2039], [2047], [2055], [2063], [2067], [2069], [2072], [2080], [2088], [2096], [2104], [2112], [2116], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2184], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 21:52:06,575 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:52:06,575 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:52:10,922 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:52:10,924 INFO L272 AbstractInterpreter]: Visited 91 different actions 91 times. Never merged. Never widened. Performed 221 root evaluator evaluations with a maximum evaluation depth of 13. Performed 221 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 21:52:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:52:10,929 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:52:13,840 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 78.51% of their original sizes. [2019-09-09 21:52:13,840 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:52:13,925 INFO L420 sIntCurrentIteration]: We unified 221 AI predicates to 221 [2019-09-09 21:52:13,925 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:52:13,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:52:13,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2019-09-09 21:52:13,926 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:52:13,927 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 21:52:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 21:52:13,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 21:52:13,928 INFO L87 Difference]: Start difference. First operand 8802 states and 13066 transitions. Second operand 10 states. [2019-09-09 21:53:57,584 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.