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/Problem10_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:15:51,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:15:51,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:15:51,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 14:15:51,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 14:15:51,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 14:15:51,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 14:15:51,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 14:15:51,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 14:15:51,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 14:15:51,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 14:15:51,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 14:15:51,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 14:15:51,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 14:15:51,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 14:15:51,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 14:15:51,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 14:15:51,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 14:15:51,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 14:15:51,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 14:15:51,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 14:15:51,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 14:15:51,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 14:15:51,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 14:15:51,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 14:15:51,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 14:15:51,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 14:15:51,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 14:15:51,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 14:15:51,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 14:15:51,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 14:15:51,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 14:15:51,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 14:15:51,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 14:15:51,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 14:15:51,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 14:15:51,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 14:15:51,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 14:15:51,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 14:15:51,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 14:15:51,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 14:15:51,461 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 14:15:51,476 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:15:51,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:15:51,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:15:51,477 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:15:51,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:15:51,478 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:15:51,478 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:15:51,478 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:15:51,478 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:15:51,479 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:15:51,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:15:51,479 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:15:51,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:15:51,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:15:51,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:15:51,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:15:51,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:15:51,481 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:15:51,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:15:51,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:15:51,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:15:51,481 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:15:51,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:15:51,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:15:51,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:15:51,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:15:51,483 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:15:51,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:15:51,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:15:51,483 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:15:51,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:15:51,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:15:51,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:15:51,539 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:15:51,540 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:15:51,540 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label22.c [2019-09-09 14:15:51,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75fb94c93/dc52c26a19ab4f45b38a2f28c0749db8/FLAG9e2fb9162 [2019-09-09 14:15:52,155 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:15:52,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label22.c [2019-09-09 14:15:52,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75fb94c93/dc52c26a19ab4f45b38a2f28c0749db8/FLAG9e2fb9162 [2019-09-09 14:15:52,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75fb94c93/dc52c26a19ab4f45b38a2f28c0749db8 [2019-09-09 14:15:52,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:15:52,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:15:52,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:15:52,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:15:52,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:15:52,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:15:52" (1/1) ... [2019-09-09 14:15:52,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6a4f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:52, skipping insertion in model container [2019-09-09 14:15:52,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:15:52" (1/1) ... [2019-09-09 14:15:52,430 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:15:52,481 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:15:53,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:15:53,025 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:15:53,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:15:53,199 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:15:53,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53 WrapperNode [2019-09-09 14:15:53,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:15:53,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:15:53,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:15:53,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:15:53,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53" (1/1) ... [2019-09-09 14:15:53,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53" (1/1) ... [2019-09-09 14:15:53,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53" (1/1) ... [2019-09-09 14:15:53,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53" (1/1) ... [2019-09-09 14:15:53,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53" (1/1) ... [2019-09-09 14:15:53,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53" (1/1) ... [2019-09-09 14:15:53,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53" (1/1) ... [2019-09-09 14:15:53,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:15:53,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:15:53,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:15:53,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:15:53,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53" (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 14:15:53,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:15:53,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:15:53,389 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:15:53,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:15:53,389 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:15:53,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:15:53,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:15:53,389 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:15:53,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:15:53,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:15:53,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:15:54,774 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:15:54,774 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:15:54,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:15:54 BoogieIcfgContainer [2019-09-09 14:15:54,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:15:54,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:15:54,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:15:54,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:15:54,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:15:52" (1/3) ... [2019-09-09 14:15:54,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b2e639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:15:54, skipping insertion in model container [2019-09-09 14:15:54,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:15:53" (2/3) ... [2019-09-09 14:15:54,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b2e639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:15:54, skipping insertion in model container [2019-09-09 14:15:54,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:15:54" (3/3) ... [2019-09-09 14:15:54,795 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label22.c [2019-09-09 14:15:54,806 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:15:54,817 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:15:54,836 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:15:54,868 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:15:54,869 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:15:54,870 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:15:54,870 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:15:54,870 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:15:54,870 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:15:54,871 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:15:54,871 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:15:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:15:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-09 14:15:54,910 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:15:54,912 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] [2019-09-09 14:15:54,916 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:15:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:15:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1257002150, now seen corresponding path program 1 times [2019-09-09 14:15:54,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:15:54,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:54,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:15:54,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:54,984 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:15:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:15:55,260 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 14:15:55,263 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:15:55,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:15:55,264 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:15:55,272 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:15:55,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:15:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:15:55,292 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-09-09 14:15:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:15:56,861 INFO L93 Difference]: Finished difference Result 524 states and 782 transitions. [2019-09-09 14:15:56,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:15:56,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-09-09 14:15:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:15:56,882 INFO L225 Difference]: With dead ends: 524 [2019-09-09 14:15:56,882 INFO L226 Difference]: Without dead ends: 437 [2019-09-09 14:15:56,884 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 14:15:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-09-09 14:15:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2019-09-09 14:15:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-09-09 14:15:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2019-09-09 14:15:56,966 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 43 [2019-09-09 14:15:56,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:15:56,966 INFO L475 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2019-09-09 14:15:56,967 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:15:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2019-09-09 14:15:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-09 14:15:56,973 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:15:56,973 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:56,974 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:15:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:15:56,974 INFO L82 PathProgramCache]: Analyzing trace with hash 961573706, now seen corresponding path program 1 times [2019-09-09 14:15:56,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:15:56,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:56,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:15:56,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:56,976 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:15:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:15:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:15:57,290 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:15:57,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:15:57,291 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:15:57,296 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:15:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:15:57,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:15:57,297 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand 6 states. [2019-09-09 14:15:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:15:58,222 INFO L93 Difference]: Finished difference Result 898 states and 1344 transitions. [2019-09-09 14:15:58,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:15:58,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-09-09 14:15:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:15:58,237 INFO L225 Difference]: With dead ends: 898 [2019-09-09 14:15:58,237 INFO L226 Difference]: Without dead ends: 898 [2019-09-09 14:15:58,238 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 14:15:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2019-09-09 14:15:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 880. [2019-09-09 14:15:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-09-09 14:15:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1284 transitions. [2019-09-09 14:15:58,315 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1284 transitions. Word has length 117 [2019-09-09 14:15:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:15:58,316 INFO L475 AbstractCegarLoop]: Abstraction has 880 states and 1284 transitions. [2019-09-09 14:15:58,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:15:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1284 transitions. [2019-09-09 14:15:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-09 14:15:58,322 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:15:58,322 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:58,322 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:15:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:15:58,323 INFO L82 PathProgramCache]: Analyzing trace with hash -956258770, now seen corresponding path program 1 times [2019-09-09 14:15:58,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:15:58,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:58,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:15:58,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:58,325 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:15:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:15:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:15:58,529 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:15:58,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:15:58,530 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:15:58,530 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:15:58,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:15:58,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:15:58,531 INFO L87 Difference]: Start difference. First operand 880 states and 1284 transitions. Second operand 6 states. [2019-09-09 14:15:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:15:59,538 INFO L93 Difference]: Finished difference Result 1345 states and 1936 transitions. [2019-09-09 14:15:59,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:15:59,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-09-09 14:15:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:15:59,548 INFO L225 Difference]: With dead ends: 1345 [2019-09-09 14:15:59,548 INFO L226 Difference]: Without dead ends: 1345 [2019-09-09 14:15:59,549 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 14:15:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2019-09-09 14:15:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1039. [2019-09-09 14:15:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-09-09 14:15:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1451 transitions. [2019-09-09 14:15:59,610 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1451 transitions. Word has length 119 [2019-09-09 14:15:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:15:59,621 INFO L475 AbstractCegarLoop]: Abstraction has 1039 states and 1451 transitions. [2019-09-09 14:15:59,621 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:15:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1451 transitions. [2019-09-09 14:15:59,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-09 14:15:59,631 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:15:59,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:59,632 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:15:59,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:15:59,632 INFO L82 PathProgramCache]: Analyzing trace with hash -550888759, now seen corresponding path program 1 times [2019-09-09 14:15:59,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:15:59,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:59,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:15:59,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:59,636 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:15:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:15:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:15:59,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:15:59,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-09 14:15:59,909 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:15:59,910 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 14:15:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 14:15:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-09 14:15:59,911 INFO L87 Difference]: Start difference. First operand 1039 states and 1451 transitions. Second operand 7 states. [2019-09-09 14:16:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:16:01,462 INFO L93 Difference]: Finished difference Result 1205 states and 1624 transitions. [2019-09-09 14:16:01,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 14:16:01,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2019-09-09 14:16:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:16:01,468 INFO L225 Difference]: With dead ends: 1205 [2019-09-09 14:16:01,468 INFO L226 Difference]: Without dead ends: 1039 [2019-09-09 14:16:01,469 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-09-09 14:16:01,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2019-09-09 14:16:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1039. [2019-09-09 14:16:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-09-09 14:16:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1444 transitions. [2019-09-09 14:16:01,502 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1444 transitions. Word has length 122 [2019-09-09 14:16:01,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:16:01,503 INFO L475 AbstractCegarLoop]: Abstraction has 1039 states and 1444 transitions. [2019-09-09 14:16:01,503 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 14:16:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1444 transitions. [2019-09-09 14:16:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 14:16:01,505 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:16:01,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:01,506 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:16:01,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:16:01,506 INFO L82 PathProgramCache]: Analyzing trace with hash 772314102, now seen corresponding path program 1 times [2019-09-09 14:16:01,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:16:01,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:16:01,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:16:01,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:16:01,508 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:16:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:16:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 14:16:01,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:16:01,604 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:16:01,605 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 124 with the following transitions: [2019-09-09 14:16:01,607 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:16:01,658 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:16:01,658 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:16:15,122 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:16:15,125 INFO L272 AbstractInterpreter]: Visited 84 different actions 84 times. Never merged. Never widened. Performed 121 root evaluator evaluations with a maximum evaluation depth of 16. Performed 121 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 14:16:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:16:15,130 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:16:24,725 INFO L227 lantSequenceWeakener]: Weakened 117 states. On average, predicates are now at 73.44% of their original sizes. [2019-09-09 14:16:24,725 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:16:24,782 INFO L420 sIntCurrentIteration]: We unified 122 AI predicates to 122 [2019-09-09 14:16:24,782 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:16:24,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:16:24,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-09-09 14:16:24,783 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:16:24,784 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 14:16:24,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 14:16:24,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 14:16:24,784 INFO L87 Difference]: Start difference. First operand 1039 states and 1444 transitions. Second operand 7 states. [2019-09-09 14:16:29,636 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:18:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:18:12,743 INFO L93 Difference]: Finished difference Result 1183 states and 1596 transitions. [2019-09-09 14:18:12,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:18:12,744 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2019-09-09 14:18:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:18:12,750 INFO L225 Difference]: With dead ends: 1183 [2019-09-09 14:18:12,750 INFO L226 Difference]: Without dead ends: 1183 [2019-09-09 14:18:12,751 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-09-09 14:18:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2019-09-09 14:18:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1182. [2019-09-09 14:18:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-09-09 14:18:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1595 transitions. [2019-09-09 14:18:12,779 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1595 transitions. Word has length 123 [2019-09-09 14:18:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:18:12,780 INFO L475 AbstractCegarLoop]: Abstraction has 1182 states and 1595 transitions. [2019-09-09 14:18:12,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 14:18:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1595 transitions. [2019-09-09 14:18:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-09-09 14:18:12,782 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:18:12,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:18:12,783 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:18:12,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:18:12,784 INFO L82 PathProgramCache]: Analyzing trace with hash -491536303, now seen corresponding path program 1 times [2019-09-09 14:18:12,784 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:18:12,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:18:12,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:18:12,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:18:12,785 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:18:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:18:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 14:18:12,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:18:12,899 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:18:12,900 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 159 with the following transitions: [2019-09-09 14:18:12,900 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:18:12,906 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:18:12,907 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:18:46,227 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:19:48,422 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:19:48,423 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 4 different actions 4 times. Never widened. Performed 461 root evaluator evaluations with a maximum evaluation depth of 16. Performed 461 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:19:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:19:48,423 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:20:37,150 INFO L227 lantSequenceWeakener]: Weakened 155 states. On average, predicates are now at 73.31% of their original sizes. [2019-09-09 14:20:37,150 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:20:37,245 INFO L420 sIntCurrentIteration]: We unified 157 AI predicates to 157 [2019-09-09 14:20:37,245 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:20:37,246 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:20:37,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [4] total 14 [2019-09-09 14:20:37,246 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:20:37,247 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 14:20:37,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 14:20:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-09-09 14:20:37,248 INFO L87 Difference]: Start difference. First operand 1182 states and 1595 transitions. Second operand 12 states. [2019-09-09 14:25:45,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:25:45,640 INFO L93 Difference]: Finished difference Result 1333 states and 1761 transitions. [2019-09-09 14:25:45,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-09 14:25:45,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 158 [2019-09-09 14:25:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:25:45,650 INFO L225 Difference]: With dead ends: 1333 [2019-09-09 14:25:45,651 INFO L226 Difference]: Without dead ends: 1333 [2019-09-09 14:25:45,652 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-09-09 14:25:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2019-09-09 14:25:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1327. [2019-09-09 14:25:45,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1327 states. [2019-09-09 14:25:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1755 transitions. [2019-09-09 14:25:45,694 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1755 transitions. Word has length 158 [2019-09-09 14:25:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:25:45,694 INFO L475 AbstractCegarLoop]: Abstraction has 1327 states and 1755 transitions. [2019-09-09 14:25:45,694 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-09 14:25:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1755 transitions. [2019-09-09 14:25:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-09 14:25:45,697 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:25:45,698 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:25:45,698 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:25:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:25:45,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1679265278, now seen corresponding path program 1 times [2019-09-09 14:25:45,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:25:45,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:25:45,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:25:45,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:25:45,700 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:25:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:25:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 14:25:45,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:25:45,849 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:25:45,849 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2019-09-09 14:25:45,852 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [754], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:25:45,866 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:25:45,866 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:27:48,645 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:27:48,645 INFO L272 AbstractInterpreter]: Visited 141 different actions 276 times. Merged at 4 different actions 4 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 16. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:27:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:27:48,646 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:28:50,308 INFO L227 lantSequenceWeakener]: Weakened 174 states. On average, predicates are now at 73.24% of their original sizes. [2019-09-09 14:28:50,309 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:28:50,470 INFO L420 sIntCurrentIteration]: We unified 176 AI predicates to 176 [2019-09-09 14:28:50,471 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:28:50,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:28:50,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [4] total 17 [2019-09-09 14:28:50,472 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:28:50,473 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-09 14:28:50,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-09 14:28:50,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-09-09 14:28:50,474 INFO L87 Difference]: Start difference. First operand 1327 states and 1755 transitions. Second operand 15 states. [2019-09-09 14:28:59,446 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.