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_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:14:08,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:14:08,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:14:08,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 19:14:08,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 19:14:08,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 19:14:08,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 19:14:08,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 19:14:08,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 19:14:08,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 19:14:08,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 19:14:08,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 19:14:08,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 19:14:08,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 19:14:08,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 19:14:08,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 19:14:08,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 19:14:08,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 19:14:08,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 19:14:08,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 19:14:08,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 19:14:08,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 19:14:08,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 19:14:08,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 19:14:08,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 19:14:08,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 19:14:08,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 19:14:08,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 19:14:08,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 19:14:08,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 19:14:08,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 19:14:08,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 19:14:08,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 19:14:08,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 19:14:08,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 19:14:08,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 19:14:08,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 19:14:08,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 19:14:08,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 19:14:08,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 19:14:08,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 19:14:08,340 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 [2019-10-02 19:14:08,355 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:14:08,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:14:08,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:14:08,356 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:14:08,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:14:08,357 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:14:08,357 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:14:08,358 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:14:08,358 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:14:08,358 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:14:08,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:14:08,359 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:14:08,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:14:08,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:14:08,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:14:08,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:14:08,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:14:08,360 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:14:08,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:14:08,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:14:08,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:14:08,361 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:14:08,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:14:08,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:14:08,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:14:08,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:14:08,362 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:14:08,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:14:08,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:14:08,363 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:14:08,391 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:14:08,407 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:14:08,416 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:14:08,418 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:14:08,419 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:14:08,419 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label50.c [2019-10-02 19:14:08,498 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf3f8ab77/4447b1a358074e64a4926f1ea8c5c40c/FLAGc18b99bd7 [2019-10-02 19:14:09,054 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:14:09,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label50.c [2019-10-02 19:14:09,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf3f8ab77/4447b1a358074e64a4926f1ea8c5c40c/FLAGc18b99bd7 [2019-10-02 19:14:09,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf3f8ab77/4447b1a358074e64a4926f1ea8c5c40c [2019-10-02 19:14:09,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:14:09,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:14:09,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:14:09,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:14:09,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:14:09,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:14:09" (1/1) ... [2019-10-02 19:14:09,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f305386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:09, skipping insertion in model container [2019-10-02 19:14:09,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:14:09" (1/1) ... [2019-10-02 19:14:09,376 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:14:09,435 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:14:10,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:14:10,020 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:14:10,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:14:10,181 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:14:10,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10 WrapperNode [2019-10-02 19:14:10,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:14:10,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:14:10,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:14:10,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:14:10,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10" (1/1) ... [2019-10-02 19:14:10,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10" (1/1) ... [2019-10-02 19:14:10,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10" (1/1) ... [2019-10-02 19:14:10,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10" (1/1) ... [2019-10-02 19:14:10,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10" (1/1) ... [2019-10-02 19:14:10,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10" (1/1) ... [2019-10-02 19:14:10,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10" (1/1) ... [2019-10-02 19:14:10,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:14:10,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:14:10,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:14:10,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:14:10,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10" (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 [2019-10-02 19:14:10,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:14:10,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:14:10,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:14:10,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:14:10,383 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:14:10,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:14:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:14:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:14:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:14:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:14:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:14:11,755 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:14:11,756 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:14:11,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:14:11 BoogieIcfgContainer [2019-10-02 19:14:11,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:14:11,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:14:11,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:14:11,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:14:11,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:14:09" (1/3) ... [2019-10-02 19:14:11,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19986572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:14:11, skipping insertion in model container [2019-10-02 19:14:11,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:14:10" (2/3) ... [2019-10-02 19:14:11,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19986572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:14:11, skipping insertion in model container [2019-10-02 19:14:11,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:14:11" (3/3) ... [2019-10-02 19:14:11,772 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label50.c [2019-10-02 19:14:11,785 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:14:11,797 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:14:11,819 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:14:11,860 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:14:11,861 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:14:11,861 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:14:11,862 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:14:11,862 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:14:11,862 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:14:11,862 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:14:11,862 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:14:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 19:14:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-02 19:14:11,907 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:11,908 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:14:11,910 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:11,917 INFO L82 PathProgramCache]: Analyzing trace with hash 397772918, now seen corresponding path program 1 times [2019-10-02 19:14:11,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:11,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:11,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:11,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:11,983 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:12,199 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:12,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 19:14:12,199 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:12,205 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 19:14:12,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 19:14:12,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:14:12,225 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 19:14:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:13,350 INFO L93 Difference]: Finished difference Result 362 states and 555 transitions. [2019-10-02 19:14:13,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 19:14:13,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-02 19:14:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:13,380 INFO L225 Difference]: With dead ends: 362 [2019-10-02 19:14:13,381 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 19:14:13,383 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:14:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 19:14:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 19:14:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 19:14:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-02 19:14:13,458 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 15 [2019-10-02 19:14:13,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:13,459 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-02 19:14:13,459 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 19:14:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-02 19:14:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-02 19:14:13,464 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:13,464 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 19:14:13,465 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:13,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1068134291, now seen corresponding path program 1 times [2019-10-02 19:14:13,466 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:13,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:13,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:13,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:13,468 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:13,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:13,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:14:13,758 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:13,760 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:14:13,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:14:13,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:14:13,761 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 6 states. [2019-10-02 19:14:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:14,736 INFO L93 Difference]: Finished difference Result 453 states and 640 transitions. [2019-10-02 19:14:14,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:14:14,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2019-10-02 19:14:14,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:14,741 INFO L225 Difference]: With dead ends: 453 [2019-10-02 19:14:14,741 INFO L226 Difference]: Without dead ends: 453 [2019-10-02 19:14:14,742 INFO L640 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 [2019-10-02 19:14:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-02 19:14:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-02 19:14:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-02 19:14:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 626 transitions. [2019-10-02 19:14:14,776 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 626 transitions. Word has length 88 [2019-10-02 19:14:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:14,777 INFO L475 AbstractCegarLoop]: Abstraction has 445 states and 626 transitions. [2019-10-02 19:14:14,777 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:14:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 626 transitions. [2019-10-02 19:14:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-02 19:14:14,781 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:14,781 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 19:14:14,782 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:14,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1363459929, now seen corresponding path program 1 times [2019-10-02 19:14:14,783 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:14,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:14,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:14,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:14,794 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:14,928 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:14,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:14:14,929 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:14,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:14:14,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:14:14,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:14:14,931 INFO L87 Difference]: Start difference. First operand 445 states and 626 transitions. Second operand 4 states. [2019-10-02 19:14:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:16,005 INFO L93 Difference]: Finished difference Result 1172 states and 1554 transitions. [2019-10-02 19:14:16,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:14:16,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-10-02 19:14:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:16,013 INFO L225 Difference]: With dead ends: 1172 [2019-10-02 19:14:16,014 INFO L226 Difference]: Without dead ends: 1172 [2019-10-02 19:14:16,014 INFO L640 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 [2019-10-02 19:14:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2019-10-02 19:14:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1172. [2019-10-02 19:14:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2019-10-02 19:14:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1554 transitions. [2019-10-02 19:14:16,093 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1554 transitions. Word has length 94 [2019-10-02 19:14:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:16,093 INFO L475 AbstractCegarLoop]: Abstraction has 1172 states and 1554 transitions. [2019-10-02 19:14:16,094 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:14:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1554 transitions. [2019-10-02 19:14:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-02 19:14:16,104 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:16,104 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:14:16,105 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash -396385674, now seen corresponding path program 1 times [2019-10-02 19:14:16,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:16,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:16,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:16,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:16,107 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:16,413 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:16,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:14:16,413 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:16,416 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:14:16,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:14:16,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:14:16,417 INFO L87 Difference]: Start difference. First operand 1172 states and 1554 transitions. Second operand 6 states. [2019-10-02 19:14:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:17,312 INFO L93 Difference]: Finished difference Result 1206 states and 1531 transitions. [2019-10-02 19:14:17,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:14:17,312 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2019-10-02 19:14:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:17,320 INFO L225 Difference]: With dead ends: 1206 [2019-10-02 19:14:17,320 INFO L226 Difference]: Without dead ends: 1206 [2019-10-02 19:14:17,321 INFO L640 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 [2019-10-02 19:14:17,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2019-10-02 19:14:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1051. [2019-10-02 19:14:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-10-02 19:14:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1334 transitions. [2019-10-02 19:14:17,359 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1334 transitions. Word has length 151 [2019-10-02 19:14:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:17,360 INFO L475 AbstractCegarLoop]: Abstraction has 1051 states and 1334 transitions. [2019-10-02 19:14:17,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:14:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1334 transitions. [2019-10-02 19:14:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-02 19:14:17,367 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:17,367 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:14:17,367 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:17,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1539466530, now seen corresponding path program 1 times [2019-10-02 19:14:17,368 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:17,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:17,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:17,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:17,370 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:14:17,610 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:14:17,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:14:17,611 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:14:17,613 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:14:17,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:14:17,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:14:17,614 INFO L87 Difference]: Start difference. First operand 1051 states and 1334 transitions. Second operand 6 states. [2019-10-02 19:14:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:14:18,517 INFO L93 Difference]: Finished difference Result 1355 states and 1688 transitions. [2019-10-02 19:14:18,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:14:18,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-10-02 19:14:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:14:18,524 INFO L225 Difference]: With dead ends: 1355 [2019-10-02 19:14:18,524 INFO L226 Difference]: Without dead ends: 1355 [2019-10-02 19:14:18,524 INFO L640 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 [2019-10-02 19:14:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2019-10-02 19:14:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1200. [2019-10-02 19:14:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-10-02 19:14:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1479 transitions. [2019-10-02 19:14:18,565 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1479 transitions. Word has length 157 [2019-10-02 19:14:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:14:18,566 INFO L475 AbstractCegarLoop]: Abstraction has 1200 states and 1479 transitions. [2019-10-02 19:14:18,566 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:14:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1479 transitions. [2019-10-02 19:14:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-02 19:14:18,572 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:14:18,572 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 19:14:18,572 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:14:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:14:18,573 INFO L82 PathProgramCache]: Analyzing trace with hash 539367001, now seen corresponding path program 1 times [2019-10-02 19:14:18,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:14:18,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:18,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:14:18,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:14:18,575 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:14:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:14:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 19:14:18,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:14:18,827 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:14:18,828 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 231 with the following transitions: [2019-10-02 19:14:18,831 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [29], [31], [34], [42], [50], [58], [66], [74], [82], [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], [534], [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], [755], [759], [762], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:14:18,908 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:14:18,909 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:14:31,100 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:15:53,398 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:15:53,402 INFO L272 AbstractInterpreter]: Visited 144 different actions 281 times. Merged at 3 different actions 3 times. Never widened. Performed 416 root evaluator evaluations with a maximum evaluation depth of 16. Performed 416 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:15:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:15:53,410 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:16:38,451 INFO L227 lantSequenceWeakener]: Weakened 227 states. On average, predicates are now at 72.59% of their original sizes. [2019-10-02 19:16:38,451 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:16:38,568 INFO L420 sIntCurrentIteration]: We unified 229 AI predicates to 229 [2019-10-02 19:16:38,568 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:16:38,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:16:38,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2019-10-02 19:16:38,569 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:16:38,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 19:16:38,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 19:16:38,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-02 19:16:38,571 INFO L87 Difference]: Start difference. First operand 1200 states and 1479 transitions. Second operand 12 states. [2019-10-02 19:20:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:20:28,417 INFO L93 Difference]: Finished difference Result 1510 states and 1798 transitions. [2019-10-02 19:20:28,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 19:20:28,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 230 [2019-10-02 19:20:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:20:28,425 INFO L225 Difference]: With dead ends: 1510 [2019-10-02 19:20:28,425 INFO L226 Difference]: Without dead ends: 1344 [2019-10-02 19:20:28,426 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-10-02 19:20:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2019-10-02 19:20:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1343. [2019-10-02 19:20:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2019-10-02 19:20:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1629 transitions. [2019-10-02 19:20:28,463 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1629 transitions. Word has length 230 [2019-10-02 19:20:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:20:28,464 INFO L475 AbstractCegarLoop]: Abstraction has 1343 states and 1629 transitions. [2019-10-02 19:20:28,464 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 19:20:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1629 transitions. [2019-10-02 19:20:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-10-02 19:20:28,469 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:20:28,470 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:20:28,470 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:20:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:20:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash -744935455, now seen corresponding path program 1 times [2019-10-02 19:20:28,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:20:28,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:20:28,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:20:28,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:20:28,473 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:20:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:20:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-02 19:20:28,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:20:28,695 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:20:28,696 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 267 with the following transitions: [2019-10-02 19:20:28,696 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [29], [31], [34], [42], [50], [58], [66], [74], [82], [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], [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], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:20:28,706 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:20:28,706 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:21:02,359 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:22:46,129 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:22:46,130 INFO L272 AbstractInterpreter]: Visited 144 different actions 282 times. Merged at 4 different actions 4 times. Never widened. Performed 527 root evaluator evaluations with a maximum evaluation depth of 16. Performed 527 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:22:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:22:46,131 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:24:43,319 INFO L227 lantSequenceWeakener]: Weakened 263 states. On average, predicates are now at 72.61% of their original sizes. [2019-10-02 19:24:43,320 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:24:43,474 INFO L420 sIntCurrentIteration]: We unified 265 AI predicates to 265 [2019-10-02 19:24:43,475 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:24:43,475 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:24:43,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 18 [2019-10-02 19:24:43,476 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:24:43,476 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 19:24:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 19:24:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-02 19:24:43,477 INFO L87 Difference]: Start difference. First operand 1343 states and 1629 transitions. Second operand 13 states.