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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:43:34,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:43:34,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:43:34,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:43:34,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 21:43:34,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 21:43:34,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 21:43:34,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 21:43:34,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 21:43:34,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 21:43:34,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 21:43:34,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 21:43:34,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:43:34,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:43:34,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:43:34,106 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 21:43:34,122 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:43:34,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:43:34,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:43:34,123 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:43:34,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:43:34,124 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:43:34,124 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:43:34,124 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:43:34,124 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:43:34,124 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:43:34,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:43:34,125 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:43:34,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:43:34,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:43:34,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:43:34,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:43:34,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:43:34,126 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:43:34,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:43:34,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:43:34,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:43:34,127 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:43:34,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:43:34,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:43:34,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:43:34,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:43:34,128 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:43:34,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:43:34,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:43:34,129 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:43:34,165 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:43:34,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:43:34,182 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:43:34,184 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:43:34,184 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:43:34,185 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label54.c [2019-09-09 21:43:34,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ef04cae/2feb348a5cb646edbae7d8f680166df5/FLAG618efb346 [2019-09-09 21:43:35,014 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:43:35,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label54.c [2019-09-09 21:43:35,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ef04cae/2feb348a5cb646edbae7d8f680166df5/FLAG618efb346 [2019-09-09 21:43:35,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ef04cae/2feb348a5cb646edbae7d8f680166df5 [2019-09-09 21:43:35,158 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:43:35,160 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:43:35,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:43:35,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:43:35,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:43:35,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:43:35" (1/1) ... [2019-09-09 21:43:35,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d00d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:35, skipping insertion in model container [2019-09-09 21:43:35,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:43:35" (1/1) ... [2019-09-09 21:43:35,186 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:43:35,311 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:43:36,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:43:36,425 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:43:36,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:43:36,841 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:43:36,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36 WrapperNode [2019-09-09 21:43:36,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:43:36,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:43:36,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:43:36,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:43:36,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36" (1/1) ... [2019-09-09 21:43:36,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36" (1/1) ... [2019-09-09 21:43:36,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36" (1/1) ... [2019-09-09 21:43:36,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36" (1/1) ... [2019-09-09 21:43:36,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36" (1/1) ... [2019-09-09 21:43:37,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36" (1/1) ... [2019-09-09 21:43:37,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36" (1/1) ... [2019-09-09 21:43:37,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:43:37,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:43:37,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:43:37,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:43:37,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36" (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 21:43:37,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:43:37,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:43:37,250 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:43:37,250 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:43:37,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:43:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:43:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:43:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:43:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:43:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:43:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:43:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:43:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:43:41,252 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:43:41,252 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:43:41,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:43:41 BoogieIcfgContainer [2019-09-09 21:43:41,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:43:41,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:43:41,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:43:41,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:43:41,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:43:35" (1/3) ... [2019-09-09 21:43:41,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fc8e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:43:41, skipping insertion in model container [2019-09-09 21:43:41,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:43:36" (2/3) ... [2019-09-09 21:43:41,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fc8e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:43:41, skipping insertion in model container [2019-09-09 21:43:41,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:43:41" (3/3) ... [2019-09-09 21:43:41,265 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label54.c [2019-09-09 21:43:41,275 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:43:41,285 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:43:41,302 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:43:41,329 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:43:41,329 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:43:41,330 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:43:41,330 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:43:41,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:43:41,330 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:43:41,330 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:43:41,331 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:43:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:43:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-09 21:43:41,386 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:43:41,387 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 21:43:41,389 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:43:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:43:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash 51921113, now seen corresponding path program 1 times [2019-09-09 21:43:41,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:43:41,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:43:41,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:43:41,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:43:41,446 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:43:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:43:41,683 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 21:43:41,686 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:43:41,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:43:41,687 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:43:41,695 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:43:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:43:41,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:43:41,714 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:43:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:43:48,446 INFO L93 Difference]: Finished difference Result 1561 states and 2684 transitions. [2019-09-09 21:43:48,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:43:48,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-09-09 21:43:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:43:48,492 INFO L225 Difference]: With dead ends: 1561 [2019-09-09 21:43:48,492 INFO L226 Difference]: Without dead ends: 1474 [2019-09-09 21:43:48,496 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 21:43:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2019-09-09 21:43:48,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1447. [2019-09-09 21:43:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1447 states. [2019-09-09 21:43:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2481 transitions. [2019-09-09 21:43:48,661 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2481 transitions. Word has length 19 [2019-09-09 21:43:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:43:48,662 INFO L475 AbstractCegarLoop]: Abstraction has 1447 states and 2481 transitions. [2019-09-09 21:43:48,663 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:43:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2481 transitions. [2019-09-09 21:43:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-09 21:43:48,671 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:43:48,672 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 21:43:48,673 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:43:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:43:48,675 INFO L82 PathProgramCache]: Analyzing trace with hash 581424041, now seen corresponding path program 1 times [2019-09-09 21:43:48,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:43:48,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:43:48,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:43:48,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:43:48,677 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:43:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:43:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:43:48,997 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:43:48,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:43:48,997 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:43:49,000 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:43:49,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:43:49,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:43:49,001 INFO L87 Difference]: Start difference. First operand 1447 states and 2481 transitions. Second operand 6 states. [2019-09-09 21:43:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:43:59,195 INFO L93 Difference]: Finished difference Result 4162 states and 6119 transitions. [2019-09-09 21:43:59,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:43:59,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-09-09 21:43:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:43:59,224 INFO L225 Difference]: With dead ends: 4162 [2019-09-09 21:43:59,225 INFO L226 Difference]: Without dead ends: 4162 [2019-09-09 21:43:59,226 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 21:43:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2019-09-09 21:43:59,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 4142. [2019-09-09 21:43:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4142 states. [2019-09-09 21:43:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4142 states to 4142 states and 6056 transitions. [2019-09-09 21:43:59,362 INFO L78 Accepts]: Start accepts. Automaton has 4142 states and 6056 transitions. Word has length 97 [2019-09-09 21:43:59,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:43:59,363 INFO L475 AbstractCegarLoop]: Abstraction has 4142 states and 6056 transitions. [2019-09-09 21:43:59,363 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:43:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4142 states and 6056 transitions. [2019-09-09 21:43:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-09 21:43:59,366 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:43:59,366 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 21:43:59,366 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:43:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:43:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1051836897, now seen corresponding path program 1 times [2019-09-09 21:43:59,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:43:59,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:43:59,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:43:59,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:43:59,369 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:43:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:43:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:43:59,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:43:59,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:43:59,516 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:43:59,517 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:43:59,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:43:59,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:43:59,518 INFO L87 Difference]: Start difference. First operand 4142 states and 6056 transitions. Second operand 6 states. [2019-09-09 21:44:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:44:04,105 INFO L93 Difference]: Finished difference Result 8349 states and 12550 transitions. [2019-09-09 21:44:04,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:44:04,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-09-09 21:44:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:44:04,169 INFO L225 Difference]: With dead ends: 8349 [2019-09-09 21:44:04,170 INFO L226 Difference]: Without dead ends: 8349 [2019-09-09 21:44:04,173 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 21:44:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2019-09-09 21:44:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 8275. [2019-09-09 21:44:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8275 states. [2019-09-09 21:44:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8275 states to 8275 states and 12051 transitions. [2019-09-09 21:44:04,472 INFO L78 Accepts]: Start accepts. Automaton has 8275 states and 12051 transitions. Word has length 98 [2019-09-09 21:44:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:44:04,472 INFO L475 AbstractCegarLoop]: Abstraction has 8275 states and 12051 transitions. [2019-09-09 21:44:04,472 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:44:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8275 states and 12051 transitions. [2019-09-09 21:44:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-09-09 21:44:04,487 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:44:04,487 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 21:44:04,488 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:44:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:44:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash -852043023, now seen corresponding path program 1 times [2019-09-09 21:44:04,488 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:44:04,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:44:04,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:44:04,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:44:04,490 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:44:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:44:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 21:44:04,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:44:04,719 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:44:04,721 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 172 with the following transitions: [2019-09-09 21:44:04,723 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1239], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:44:04,793 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:44:04,794 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:44:08,246 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 21:44:10,373 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:44:10,375 INFO L272 AbstractInterpreter]: Visited 86 different actions 167 times. Merged at 4 different actions 5 times. Never widened. Performed 389 root evaluator evaluations with a maximum evaluation depth of 15. Performed 389 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 21:44:10,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:44:10,379 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:44:13,708 INFO L227 lantSequenceWeakener]: Weakened 168 states. On average, predicates are now at 74.94% of their original sizes. [2019-09-09 21:44:13,709 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:44:13,812 INFO L420 sIntCurrentIteration]: We unified 170 AI predicates to 170 [2019-09-09 21:44:13,812 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:44:13,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:44:13,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 21:44:13,813 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:44:13,816 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 21:44:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 21:44:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 21:44:13,817 INFO L87 Difference]: Start difference. First operand 8275 states and 12051 transitions. Second operand 11 states.