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/Problem17_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:49:34,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:49:34,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:49:34,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:49:34,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 20:49:34,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 20:49:34,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 20:49:34,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 20:49:34,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 20:49:34,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 20:49:34,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 20:49:34,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 20:49:34,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:49:34,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:49:34,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:49:34,139 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 20:49:34,153 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:49:34,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:49:34,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:49:34,154 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:49:34,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:49:34,155 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:49:34,155 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:49:34,155 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:49:34,155 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:49:34,155 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:49:34,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:49:34,156 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:49:34,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:49:34,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:49:34,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:49:34,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:49:34,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:49:34,157 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:49:34,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:49:34,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:49:34,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:49:34,158 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:49:34,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:49:34,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:49:34,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:49:34,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:49:34,159 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:49:34,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:49:34,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:49:34,160 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:49:34,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:49:34,201 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:49:34,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:49:34,206 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:49:34,207 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:49:34,207 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label00.c [2019-09-09 20:49:34,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7694e076e/7fc62c7cbd8142aeb99f0aa86fdd552e/FLAG0bd61a088 [2019-09-09 20:49:35,015 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:49:35,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label00.c [2019-09-09 20:49:35,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7694e076e/7fc62c7cbd8142aeb99f0aa86fdd552e/FLAG0bd61a088 [2019-09-09 20:49:35,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7694e076e/7fc62c7cbd8142aeb99f0aa86fdd552e [2019-09-09 20:49:35,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:49:35,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:49:35,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:49:35,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:49:35,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:49:35,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:49:35" (1/1) ... [2019-09-09 20:49:35,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4db4b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:35, skipping insertion in model container [2019-09-09 20:49:35,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:49:35" (1/1) ... [2019-09-09 20:49:35,145 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:49:35,254 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:49:36,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:49:36,258 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:49:36,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:49:36,681 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:49:36,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36 WrapperNode [2019-09-09 20:49:36,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:49:36,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:49:36,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:49:36,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:49:36,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36" (1/1) ... [2019-09-09 20:49:36,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36" (1/1) ... [2019-09-09 20:49:36,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36" (1/1) ... [2019-09-09 20:49:36,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36" (1/1) ... [2019-09-09 20:49:36,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36" (1/1) ... [2019-09-09 20:49:36,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36" (1/1) ... [2019-09-09 20:49:36,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36" (1/1) ... [2019-09-09 20:49:36,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:49:36,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:49:36,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:49:36,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:49:36,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36" (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 20:49:37,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:49:37,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:49:37,072 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:49:37,072 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:49:37,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:49:37,072 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:49:37,073 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:49:37,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:49:37,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:49:37,073 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:49:37,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:49:37,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:49:37,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:49:41,512 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:49:41,513 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:49:41,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:49:41 BoogieIcfgContainer [2019-09-09 20:49:41,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:49:41,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:49:41,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:49:41,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:49:41,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:49:35" (1/3) ... [2019-09-09 20:49:41,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d875b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:49:41, skipping insertion in model container [2019-09-09 20:49:41,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:49:36" (2/3) ... [2019-09-09 20:49:41,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d875b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:49:41, skipping insertion in model container [2019-09-09 20:49:41,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:49:41" (3/3) ... [2019-09-09 20:49:41,531 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label00.c [2019-09-09 20:49:41,543 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:49:41,553 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:49:41,572 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:49:41,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:49:41,605 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:49:41,605 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:49:41,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:49:41,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:49:41,606 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:49:41,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:49:41,606 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:49:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 20:49:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-09 20:49:41,686 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:49:41,688 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] [2019-09-09 20:49:41,692 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:49:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:49:41,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1065858481, now seen corresponding path program 1 times [2019-09-09 20:49:41,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:49:41,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:49:41,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:49:41,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:49:41,777 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:49:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:49:42,233 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 20:49:42,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:49:42,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:49:42,237 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:49:42,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:49:42,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:49:42,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:49:42,272 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 20:49:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:49:49,288 INFO L93 Difference]: Finished difference Result 1538 states and 2353 transitions. [2019-09-09 20:49:49,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:49:49,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2019-09-09 20:49:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:49:49,323 INFO L225 Difference]: With dead ends: 1538 [2019-09-09 20:49:49,324 INFO L226 Difference]: Without dead ends: 1453 [2019-09-09 20:49:49,326 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:49:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2019-09-09 20:49:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1451. [2019-09-09 20:49:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1451 states. [2019-09-09 20:49:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 2219 transitions. [2019-09-09 20:49:49,468 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 2219 transitions. Word has length 60 [2019-09-09 20:49:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:49:49,469 INFO L475 AbstractCegarLoop]: Abstraction has 1451 states and 2219 transitions. [2019-09-09 20:49:49,470 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:49:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 2219 transitions. [2019-09-09 20:49:49,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-09 20:49:49,487 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:49:49,488 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, 1, 1, 1, 1, 1, 1, 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 20:49:49,488 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:49:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:49:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash 264021352, now seen corresponding path program 1 times [2019-09-09 20:49:49,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:49:49,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:49:49,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:49:49,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:49:49,493 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:49:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:49:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:49:49,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:49:49,844 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:49:49,845 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 135 with the following transitions: [2019-09-09 20:49:49,848 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1098], [1100], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 20:49:49,904 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:49:49,905 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:49:54,019 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 20:49:55,533 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:49:55,536 INFO L272 AbstractInterpreter]: Visited 81 different actions 157 times. Merged at 4 different actions 5 times. Never widened. Performed 373 root evaluator evaluations with a maximum evaluation depth of 15. Performed 373 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 20:49:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:49:55,541 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:49:57,678 INFO L227 lantSequenceWeakener]: Weakened 131 states. On average, predicates are now at 76.18% of their original sizes. [2019-09-09 20:49:57,678 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:49:57,766 INFO L420 sIntCurrentIteration]: We unified 133 AI predicates to 133 [2019-09-09 20:49:57,766 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:49:57,767 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:49:57,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 20:49:57,767 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:49:57,769 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 20:49:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 20:49:57,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 20:49:57,769 INFO L87 Difference]: Start difference. First operand 1451 states and 2219 transitions. Second operand 11 states.