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_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:22:24,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:22:24,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:22:24,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 21:22:24,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 21:22:24,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 21:22:24,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 21:22:24,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 21:22:24,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 21:22:24,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 21:22:24,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 21:22:24,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 21:22:24,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 21:22:24,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 21:22:24,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 21:22:24,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 21:22:24,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 21:22:24,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 21:22:24,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 21:22:24,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 21:22:24,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 21:22:24,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 21:22:24,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 21:22:24,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 21:22:24,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 21:22:24,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 21:22:24,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 21:22:24,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 21:22:24,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 21:22:24,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 21:22:24,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 21:22:24,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 21:22:24,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 21:22:24,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 21:22:24,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 21:22:24,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 21:22:24,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 21:22:24,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 21:22:24,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:22:24,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:22:24,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:22:24,323 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 21:22:24,342 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:22:24,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:22:24,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:22:24,345 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:22:24,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:22:24,346 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:22:24,346 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:22:24,347 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:22:24,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:22:24,347 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:22:24,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:22:24,349 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:22:24,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:22:24,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:22:24,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:22:24,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:22:24,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:22:24,351 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:22:24,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:22:24,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:22:24,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:22:24,351 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:22:24,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:22:24,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:22:24,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:22:24,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:22:24,353 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:22:24,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:22:24,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:22:24,354 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:22:24,408 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:22:24,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:22:24,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:22:24,426 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:22:24,427 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:22:24,428 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label32.c [2019-09-09 21:22:24,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5347fde50/4294dbba33a14a72b825cfce83acfe65/FLAGdaec05fad [2019-09-09 21:22:25,142 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:22:25,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label32.c [2019-09-09 21:22:25,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5347fde50/4294dbba33a14a72b825cfce83acfe65/FLAGdaec05fad [2019-09-09 21:22:25,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5347fde50/4294dbba33a14a72b825cfce83acfe65 [2019-09-09 21:22:25,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:22:25,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:22:25,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:22:25,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:22:25,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:22:25,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:22:25" (1/1) ... [2019-09-09 21:22:25,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1ea0e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:25, skipping insertion in model container [2019-09-09 21:22:25,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:22:25" (1/1) ... [2019-09-09 21:22:25,373 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:22:25,496 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:22:26,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:22:26,480 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:22:26,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:22:26,886 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:22:26,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26 WrapperNode [2019-09-09 21:22:26,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:22:26,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:22:26,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:22:26,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:22:26,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26" (1/1) ... [2019-09-09 21:22:26,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26" (1/1) ... [2019-09-09 21:22:26,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26" (1/1) ... [2019-09-09 21:22:26,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26" (1/1) ... [2019-09-09 21:22:27,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26" (1/1) ... [2019-09-09 21:22:27,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26" (1/1) ... [2019-09-09 21:22:27,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26" (1/1) ... [2019-09-09 21:22:27,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:22:27,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:22:27,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:22:27,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:22:27,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26" (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 21:22:27,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:22:27,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:22:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:22:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:22:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:22:27,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:22:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:22:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:22:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:22:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:22:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:22:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:22:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:22:31,398 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:22:31,399 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:22:31,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:22:31 BoogieIcfgContainer [2019-09-09 21:22:31,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:22:31,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:22:31,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:22:31,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:22:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:22:25" (1/3) ... [2019-09-09 21:22:31,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64105373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:22:31, skipping insertion in model container [2019-09-09 21:22:31,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:22:26" (2/3) ... [2019-09-09 21:22:31,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64105373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:22:31, skipping insertion in model container [2019-09-09 21:22:31,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:22:31" (3/3) ... [2019-09-09 21:22:31,417 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label32.c [2019-09-09 21:22:31,432 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:22:31,442 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:22:31,460 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:22:31,490 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:22:31,491 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:22:31,491 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:22:31,491 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:22:31,491 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:22:31,491 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:22:31,491 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:22:31,492 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:22:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:22:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-09 21:22:31,545 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:22:31,546 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] [2019-09-09 21:22:31,548 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:22:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:22:31,554 INFO L82 PathProgramCache]: Analyzing trace with hash -461510759, now seen corresponding path program 1 times [2019-09-09 21:22:31,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:22:31,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:22:31,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:22:31,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:22:31,601 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:22:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:22:31,909 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 21:22:31,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:22:31,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:22:31,912 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:22:31,919 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:22:31,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:22:31,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:22:31,936 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:22:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:22:38,320 INFO L93 Difference]: Finished difference Result 1517 states and 2104 transitions. [2019-09-09 21:22:38,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:22:38,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2019-09-09 21:22:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:22:38,360 INFO L225 Difference]: With dead ends: 1517 [2019-09-09 21:22:38,360 INFO L226 Difference]: Without dead ends: 1432 [2019-09-09 21:22:38,362 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 21:22:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2019-09-09 21:22:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 977. [2019-09-09 21:22:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2019-09-09 21:22:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1461 transitions. [2019-09-09 21:22:38,465 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1461 transitions. Word has length 54 [2019-09-09 21:22:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:22:38,466 INFO L475 AbstractCegarLoop]: Abstraction has 977 states and 1461 transitions. [2019-09-09 21:22:38,466 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:22:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1461 transitions. [2019-09-09 21:22:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-09 21:22:38,472 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:22:38,472 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:38,473 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:22:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:22:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1192538896, now seen corresponding path program 1 times [2019-09-09 21:22:38,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:22:38,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:22:38,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:22:38,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:22:38,475 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:22:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:22:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:22:38,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:22:38,824 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:22:38,825 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 129 with the following transitions: [2019-09-09 21:22:38,827 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], [1050], [1052], [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], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:22:38,892 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:22:38,893 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:22:42,314 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 21:22:43,882 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:22:43,885 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 21:22:43,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:22:43,890 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:22:45,906 INFO L227 lantSequenceWeakener]: Weakened 125 states. On average, predicates are now at 76.03% of their original sizes. [2019-09-09 21:22:45,906 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:22:46,008 INFO L420 sIntCurrentIteration]: We unified 127 AI predicates to 127 [2019-09-09 21:22:46,008 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:22:46,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:22:46,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-09-09 21:22:46,010 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:22:46,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 21:22:46,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 21:22:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 21:22:46,013 INFO L87 Difference]: Start difference. First operand 977 states and 1461 transitions. Second operand 11 states.