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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:20:52,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:20:52,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:20:52,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 14:20:52,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 14:20:52,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 14:20:52,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 14:20:52,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 14:20:52,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 14:20:52,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 14:20:52,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 14:20:52,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 14:20:52,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 14:20:52,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 14:20:52,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 14:20:52,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 14:20:52,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 14:20:52,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 14:20:52,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 14:20:52,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 14:20:52,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 14:20:52,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 14:20:52,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 14:20:52,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 14:20:52,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 14:20:52,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 14:20:52,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 14:20:52,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 14:20:52,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 14:20:52,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 14:20:52,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 14:20:52,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 14:20:52,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 14:20:52,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 14:20:52,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 14:20:52,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 14:20:52,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 14:20:52,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 14:20:52,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 14:20:52,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 14:20:52,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 14:20:52,249 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 14:20:52,263 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:20:52,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:20:52,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:20:52,264 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:20:52,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:20:52,265 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:20:52,265 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:20:52,265 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:20:52,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:20:52,266 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:20:52,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:20:52,266 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:20:52,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:20:52,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:20:52,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:20:52,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:20:52,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:20:52,268 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:20:52,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:20:52,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:20:52,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:20:52,268 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:20:52,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:20:52,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:20:52,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:20:52,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:20:52,269 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:20:52,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:20:52,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:20:52,270 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:20:52,307 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:20:52,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:20:52,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:20:52,330 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:20:52,330 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:20:52,331 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label26.c [2019-09-09 14:20:52,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e17b60a9/e6de0b576f2b4b128bcf2533d209a742/FLAG4ec33f17c [2019-09-09 14:20:52,990 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:20:52,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label26.c [2019-09-09 14:20:53,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e17b60a9/e6de0b576f2b4b128bcf2533d209a742/FLAG4ec33f17c [2019-09-09 14:20:53,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e17b60a9/e6de0b576f2b4b128bcf2533d209a742 [2019-09-09 14:20:53,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:20:53,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:20:53,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:20:53,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:20:53,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:20:53,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:20:53" (1/1) ... [2019-09-09 14:20:53,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481cb625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53, skipping insertion in model container [2019-09-09 14:20:53,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:20:53" (1/1) ... [2019-09-09 14:20:53,288 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:20:53,347 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:20:53,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:20:53,856 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:20:53,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:20:53,972 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:20:53,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53 WrapperNode [2019-09-09 14:20:53,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:20:53,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:20:53,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:20:53,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:20:53,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53" (1/1) ... [2019-09-09 14:20:53,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53" (1/1) ... [2019-09-09 14:20:54,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53" (1/1) ... [2019-09-09 14:20:54,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53" (1/1) ... [2019-09-09 14:20:54,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53" (1/1) ... [2019-09-09 14:20:54,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53" (1/1) ... [2019-09-09 14:20:54,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53" (1/1) ... [2019-09-09 14:20:54,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:20:54,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:20:54,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:20:54,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:20:54,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53" (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 14:20:54,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:20:54,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:20:54,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:20:54,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:20:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:20:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:20:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:20:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:20:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:20:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:20:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:20:55,338 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:20:55,338 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:20:55,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:20:55 BoogieIcfgContainer [2019-09-09 14:20:55,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:20:55,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:20:55,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:20:55,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:20:55,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:20:53" (1/3) ... [2019-09-09 14:20:55,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8a8511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:20:55, skipping insertion in model container [2019-09-09 14:20:55,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:20:53" (2/3) ... [2019-09-09 14:20:55,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8a8511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:20:55, skipping insertion in model container [2019-09-09 14:20:55,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:20:55" (3/3) ... [2019-09-09 14:20:55,349 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label26.c [2019-09-09 14:20:55,359 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:20:55,368 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:20:55,386 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:20:55,414 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:20:55,414 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:20:55,414 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:20:55,415 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:20:55,415 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:20:55,415 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:20:55,415 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:20:55,416 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:20:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:20:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-09 14:20:55,450 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:20:55,451 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] [2019-09-09 14:20:55,453 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:20:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:20:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash 691378151, now seen corresponding path program 1 times [2019-09-09 14:20:55,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:20:55,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:20:55,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:20:55,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:20:55,517 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:20:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:20:55,742 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 14:20:55,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:20:55,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:20:55,746 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:20:55,751 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:20:55,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:20:55,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:20:55,771 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-09-09 14:20:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:20:57,391 INFO L93 Difference]: Finished difference Result 524 states and 782 transitions. [2019-09-09 14:20:57,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:20:57,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-09-09 14:20:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:20:57,416 INFO L225 Difference]: With dead ends: 524 [2019-09-09 14:20:57,417 INFO L226 Difference]: Without dead ends: 437 [2019-09-09 14:20:57,421 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 14:20:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-09-09 14:20:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2019-09-09 14:20:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-09-09 14:20:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2019-09-09 14:20:57,529 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 22 [2019-09-09 14:20:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:20:57,530 INFO L475 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2019-09-09 14:20:57,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:20:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2019-09-09 14:20:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-09 14:20:57,535 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:20:57,535 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 14:20:57,536 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:20:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:20:57,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1228814622, now seen corresponding path program 1 times [2019-09-09 14:20:57,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:20:57,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:20:57,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:20:57,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:20:57,538 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:20:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:20:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:20:57,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:20:57,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:20:57,763 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:20:57,765 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:20:57,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:20:57,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:20:57,766 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand 6 states. [2019-09-09 14:20:58,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:20:58,792 INFO L93 Difference]: Finished difference Result 898 states and 1344 transitions. [2019-09-09 14:20:58,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:20:58,795 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-09-09 14:20:58,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:20:58,808 INFO L225 Difference]: With dead ends: 898 [2019-09-09 14:20:58,809 INFO L226 Difference]: Without dead ends: 898 [2019-09-09 14:20:58,810 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 14:20:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2019-09-09 14:20:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 880. [2019-09-09 14:20:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-09-09 14:20:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1284 transitions. [2019-09-09 14:20:58,861 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1284 transitions. Word has length 96 [2019-09-09 14:20:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:20:58,862 INFO L475 AbstractCegarLoop]: Abstraction has 880 states and 1284 transitions. [2019-09-09 14:20:58,862 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:20:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1284 transitions. [2019-09-09 14:20:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-09 14:20:58,866 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:20:58,867 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 14:20:58,867 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:20:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:20:58,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1581481538, now seen corresponding path program 1 times [2019-09-09 14:20:58,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:20:58,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:20:58,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:20:58,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:20:58,869 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:20:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:20:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:20:59,061 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:20:59,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:20:59,062 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:20:59,062 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:20:59,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:20:59,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:20:59,063 INFO L87 Difference]: Start difference. First operand 880 states and 1284 transitions. Second operand 6 states. [2019-09-09 14:21:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:21:00,014 INFO L93 Difference]: Finished difference Result 1345 states and 1934 transitions. [2019-09-09 14:21:00,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:21:00,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-09-09 14:21:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:21:00,023 INFO L225 Difference]: With dead ends: 1345 [2019-09-09 14:21:00,024 INFO L226 Difference]: Without dead ends: 1345 [2019-09-09 14:21:00,024 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 14:21:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2019-09-09 14:21:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1039. [2019-09-09 14:21:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-09-09 14:21:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1449 transitions. [2019-09-09 14:21:00,095 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1449 transitions. Word has length 98 [2019-09-09 14:21:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:21:00,105 INFO L475 AbstractCegarLoop]: Abstraction has 1039 states and 1449 transitions. [2019-09-09 14:21:00,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:21:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1449 transitions. [2019-09-09 14:21:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-09 14:21:00,110 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:21:00,110 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 14:21:00,110 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:21:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:21:00,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1874071259, now seen corresponding path program 1 times [2019-09-09 14:21:00,111 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:21:00,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:21:00,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:21:00,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:21:00,114 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:21:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:21:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:21:00,202 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:21:00,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:21:00,203 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:21:00,203 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:21:00,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:21:00,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:21:00,204 INFO L87 Difference]: Start difference. First operand 1039 states and 1449 transitions. Second operand 4 states. [2019-09-09 14:21:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:21:01,358 INFO L93 Difference]: Finished difference Result 1909 states and 2565 transitions. [2019-09-09 14:21:01,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:21:01,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2019-09-09 14:21:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:21:01,370 INFO L225 Difference]: With dead ends: 1909 [2019-09-09 14:21:01,370 INFO L226 Difference]: Without dead ends: 1472 [2019-09-09 14:21:01,371 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 14:21:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2019-09-09 14:21:01,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1329. [2019-09-09 14:21:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1329 states. [2019-09-09 14:21:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1824 transitions. [2019-09-09 14:21:01,429 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1824 transitions. Word has length 101 [2019-09-09 14:21:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:21:01,430 INFO L475 AbstractCegarLoop]: Abstraction has 1329 states and 1824 transitions. [2019-09-09 14:21:01,430 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:21:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1824 transitions. [2019-09-09 14:21:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-09-09 14:21:01,433 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:21:01,433 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 14:21:01,434 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:21:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:21:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1198074754, now seen corresponding path program 1 times [2019-09-09 14:21:01,434 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:21:01,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:21:01,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:21:01,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:21:01,436 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:21:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:21:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:21:01,607 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:21:01,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:21:01,607 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:21:01,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:21:01,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:21:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:21:01,609 INFO L87 Difference]: Start difference. First operand 1329 states and 1824 transitions. Second operand 6 states. [2019-09-09 14:21:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:21:02,419 INFO L93 Difference]: Finished difference Result 1953 states and 2657 transitions. [2019-09-09 14:21:02,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:21:02,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-09-09 14:21:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:21:02,431 INFO L225 Difference]: With dead ends: 1953 [2019-09-09 14:21:02,431 INFO L226 Difference]: Without dead ends: 1953 [2019-09-09 14:21:02,431 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 14:21:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2019-09-09 14:21:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1774. [2019-09-09 14:21:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1774 states. [2019-09-09 14:21:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2331 transitions. [2019-09-09 14:21:02,486 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2331 transitions. Word has length 144 [2019-09-09 14:21:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:21:02,486 INFO L475 AbstractCegarLoop]: Abstraction has 1774 states and 2331 transitions. [2019-09-09 14:21:02,486 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:21:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2331 transitions. [2019-09-09 14:21:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-09-09 14:21:02,494 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:21:02,495 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-09-09 14:21:02,495 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:21:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:21:02,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1270560873, now seen corresponding path program 1 times [2019-09-09 14:21:02,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:21:02,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:21:02,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:21:02,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:21:02,497 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:21:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:21:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 109 proven. 74 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-09-09 14:21:03,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:21:03,001 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:21:03,002 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 332 with the following transitions: [2019-09-09 14:21:03,004 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [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], [506], [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], [679], [683], [687], [691], [695], [699], [703], [706], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:21:03,056 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:21:03,057 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:21:37,036 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:23:52,240 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:23:52,243 INFO L272 AbstractInterpreter]: Visited 131 different actions 385 times. Merged at 6 different actions 12 times. Never widened. Performed 808 root evaluator evaluations with a maximum evaluation depth of 16. Performed 808 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 14:23:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:23:52,246 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:25:25,123 INFO L227 lantSequenceWeakener]: Weakened 328 states. On average, predicates are now at 72.75% of their original sizes. [2019-09-09 14:25:25,124 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:25:25,221 INFO L420 sIntCurrentIteration]: We unified 330 AI predicates to 330 [2019-09-09 14:25:25,221 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:25:25,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:25:25,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2019-09-09 14:25:25,222 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:25:25,223 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 14:25:25,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 14:25:25,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 14:25:25,224 INFO L87 Difference]: Start difference. First operand 1774 states and 2331 transitions. Second operand 10 states. [2019-09-09 14:29:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:29:39,378 INFO L93 Difference]: Finished difference Result 2214 states and 2813 transitions. [2019-09-09 14:29:39,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 14:29:39,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 331 [2019-09-09 14:29:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:29:39,389 INFO L225 Difference]: With dead ends: 2214 [2019-09-09 14:29:39,389 INFO L226 Difference]: Without dead ends: 2214 [2019-09-09 14:29:39,389 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-09-09 14:29:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2019-09-09 14:29:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2211. [2019-09-09 14:29:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2211 states. [2019-09-09 14:29:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 2810 transitions. [2019-09-09 14:29:39,446 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 2810 transitions. Word has length 331 [2019-09-09 14:29:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:29:39,446 INFO L475 AbstractCegarLoop]: Abstraction has 2211 states and 2810 transitions. [2019-09-09 14:29:39,447 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 14:29:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 2810 transitions. [2019-09-09 14:29:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-09-09 14:29:39,456 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:29:39,456 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-09-09 14:29:39,457 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:29:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:29:39,457 INFO L82 PathProgramCache]: Analyzing trace with hash -739469282, now seen corresponding path program 1 times [2019-09-09 14:29:39,457 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:29:39,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:29:39,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:29:39,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:29:39,459 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:29:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:29:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 122 proven. 87 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-09-09 14:29:39,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:29:39,837 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:29:39,837 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 345 with the following transitions: [2019-09-09 14:29:39,837 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [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], [558], [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], [679], [683], [687], [691], [695], [699], [703], [706], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:29:39,843 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:29:39,843 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:30:12,943 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.