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/Problem03_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 07:47:40,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 07:47:40,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 07:47:40,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 07:47:40,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 07:47:40,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 07:47:40,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 07:47:40,252 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 07:47:40,278 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 07:47:40,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 07:47:40,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 07:47:40,279 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 07:47:40,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 07:47:40,284 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 07:47:40,284 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 07:47:40,284 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 07:47:40,285 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 07:47:40,285 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 07:47:40,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 07:47:40,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 07:47:40,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 07:47:40,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 07:47:40,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 07:47:40,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 07:47:40,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 07:47:40,288 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 07:47:40,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 07:47:40,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 07:47:40,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 07:47:40,289 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 07:47:40,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 07:47:40,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 07:47:40,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 07:47:40,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 07:47:40,291 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 07:47:40,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 07:47:40,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 07:47:40,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 07:47:40,339 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 07:47:40,352 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 07:47:40,356 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 07:47:40,357 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 07:47:40,358 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 07:47:40,359 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2019-09-09 07:47:40,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/160312275/c15e9d3be85a412ead7d01b0c7181df9/FLAGf4e5ec0ab [2019-09-09 07:47:41,113 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 07:47:41,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2019-09-09 07:47:41,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/160312275/c15e9d3be85a412ead7d01b0c7181df9/FLAGf4e5ec0ab [2019-09-09 07:47:41,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/160312275/c15e9d3be85a412ead7d01b0c7181df9 [2019-09-09 07:47:41,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 07:47:41,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 07:47:41,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 07:47:41,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 07:47:41,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 07:47:41,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:47:41" (1/1) ... [2019-09-09 07:47:41,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10fc2b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:41, skipping insertion in model container [2019-09-09 07:47:41,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:47:41" (1/1) ... [2019-09-09 07:47:41,277 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 07:47:41,371 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 07:47:42,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:47:42,147 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 07:47:42,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:47:42,475 INFO L192 MainTranslator]: Completed translation [2019-09-09 07:47:42,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42 WrapperNode [2019-09-09 07:47:42,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 07:47:42,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 07:47:42,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 07:47:42,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 07:47:42,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42" (1/1) ... [2019-09-09 07:47:42,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42" (1/1) ... [2019-09-09 07:47:42,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42" (1/1) ... [2019-09-09 07:47:42,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42" (1/1) ... [2019-09-09 07:47:42,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42" (1/1) ... [2019-09-09 07:47:42,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42" (1/1) ... [2019-09-09 07:47:42,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42" (1/1) ... [2019-09-09 07:47:42,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 07:47:42,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 07:47:42,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 07:47:42,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 07:47:42,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42" (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 07:47:42,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 07:47:42,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 07:47:42,703 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 07:47:42,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 07:47:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 07:47:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 07:47:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 07:47:42,703 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 07:47:42,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 07:47:42,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 07:47:42,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 07:47:44,700 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 07:47:44,701 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 07:47:44,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:47:44 BoogieIcfgContainer [2019-09-09 07:47:44,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 07:47:44,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 07:47:44,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 07:47:44,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 07:47:44,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:47:41" (1/3) ... [2019-09-09 07:47:44,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54648d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:47:44, skipping insertion in model container [2019-09-09 07:47:44,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:47:42" (2/3) ... [2019-09-09 07:47:44,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54648d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:47:44, skipping insertion in model container [2019-09-09 07:47:44,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:47:44" (3/3) ... [2019-09-09 07:47:44,721 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label34.c [2019-09-09 07:47:44,735 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 07:47:44,799 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 07:47:44,818 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 07:47:44,851 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 07:47:44,852 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 07:47:44,852 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 07:47:44,852 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 07:47:44,852 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 07:47:44,852 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 07:47:44,853 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 07:47:44,853 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 07:47:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-09-09 07:47:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-09-09 07:47:44,935 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:47:44,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:44,941 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:47:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:47:44,948 INFO L82 PathProgramCache]: Analyzing trace with hash -476273699, now seen corresponding path program 1 times [2019-09-09 07:47:44,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:47:45,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:45,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:47:45,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:45,004 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:47:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:47:45,817 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 07:47:45,820 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:47:45,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 07:47:45,820 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:47:45,826 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 07:47:45,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 07:47:45,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 07:47:45,845 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2019-09-09 07:47:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:47:48,214 INFO L93 Difference]: Finished difference Result 765 states and 1280 transitions. [2019-09-09 07:47:48,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 07:47:48,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 196 [2019-09-09 07:47:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:47:48,242 INFO L225 Difference]: With dead ends: 765 [2019-09-09 07:47:48,242 INFO L226 Difference]: Without dead ends: 677 [2019-09-09 07:47:48,244 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 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 07:47:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2019-09-09 07:47:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 458. [2019-09-09 07:47:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2019-09-09 07:47:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 752 transitions. [2019-09-09 07:47:48,325 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 752 transitions. Word has length 196 [2019-09-09 07:47:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:47:48,326 INFO L475 AbstractCegarLoop]: Abstraction has 458 states and 752 transitions. [2019-09-09 07:47:48,326 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 07:47:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 752 transitions. [2019-09-09 07:47:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-09-09 07:47:48,331 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:47:48,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:48,332 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:47:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:47:48,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1988045866, now seen corresponding path program 1 times [2019-09-09 07:47:48,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:47:48,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:48,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:47:48,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:48,334 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:47:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:47:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:47:48,564 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:47:48,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 07:47:48,564 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:47:48,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 07:47:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 07:47:48,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 07:47:48,571 INFO L87 Difference]: Start difference. First operand 458 states and 752 transitions. Second operand 6 states. [2019-09-09 07:47:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:47:50,429 INFO L93 Difference]: Finished difference Result 902 states and 1338 transitions. [2019-09-09 07:47:50,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 07:47:50,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 223 [2019-09-09 07:47:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:47:50,438 INFO L225 Difference]: With dead ends: 902 [2019-09-09 07:47:50,438 INFO L226 Difference]: Without dead ends: 902 [2019-09-09 07:47:50,439 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 07:47:50,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-09-09 07:47:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 885. [2019-09-09 07:47:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 885 states. [2019-09-09 07:47:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1304 transitions. [2019-09-09 07:47:50,496 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1304 transitions. Word has length 223 [2019-09-09 07:47:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:47:50,497 INFO L475 AbstractCegarLoop]: Abstraction has 885 states and 1304 transitions. [2019-09-09 07:47:50,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 07:47:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1304 transitions. [2019-09-09 07:47:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-09-09 07:47:50,502 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:47:50,502 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:50,503 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:47:50,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:47:50,503 INFO L82 PathProgramCache]: Analyzing trace with hash 554877003, now seen corresponding path program 1 times [2019-09-09 07:47:50,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:47:50,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:50,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:47:50,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:50,505 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:47:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:47:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:47:50,847 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:47:50,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 07:47:50,847 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:47:50,848 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 07:47:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 07:47:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 07:47:50,851 INFO L87 Difference]: Start difference. First operand 885 states and 1304 transitions. Second operand 6 states. [2019-09-09 07:47:52,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:47:52,601 INFO L93 Difference]: Finished difference Result 1365 states and 1966 transitions. [2019-09-09 07:47:52,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 07:47:52,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 241 [2019-09-09 07:47:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:47:52,617 INFO L225 Difference]: With dead ends: 1365 [2019-09-09 07:47:52,617 INFO L226 Difference]: Without dead ends: 1365 [2019-09-09 07:47:52,618 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 07:47:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2019-09-09 07:47:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1326. [2019-09-09 07:47:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2019-09-09 07:47:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1881 transitions. [2019-09-09 07:47:52,711 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1881 transitions. Word has length 241 [2019-09-09 07:47:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:47:52,720 INFO L475 AbstractCegarLoop]: Abstraction has 1326 states and 1881 transitions. [2019-09-09 07:47:52,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 07:47:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1881 transitions. [2019-09-09 07:47:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-09-09 07:47:52,729 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:47:52,730 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:52,730 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:47:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:47:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1643011650, now seen corresponding path program 1 times [2019-09-09 07:47:52,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:47:52,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:52,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:47:52,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:47:52,732 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:47:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:47:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 07:47:52,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 07:47:52,908 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 07:47:52,910 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 248 with the following transitions: [2019-09-09 07:47:52,912 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [71], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1037], [1039], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-09-09 07:47:53,010 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 07:47:53,011 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)